Academic literature on the topic 'Prototypage rapide – Analyse'
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Journal articles on the topic "Prototypage rapide – Analyse"
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Plante, Patrick, Gustavo Adolfo Angulo Mendoza, and Patrick Archambault. "Analyse, développement et évaluation d'une formation médicale en ligne." Médiations et médiatisations, no. 2 (November 15, 2019): 6–28. http://dx.doi.org/10.52358/mm.vi2.95.
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Dans le cadre d’un projet intitulé Evaluation of a context-adapted wiki-based decision aid supporting critically ill patients’ decisions about life-sustaining therapies, financé par le Réseau canadien des soins aux personnes fragilisées, l’équipe de conception pédagogique de la Société pour l’apprentissage à vie (SAVIE) s’est joint au projet de recherche afin de développer une formation en ligne destinée aux médecins, aux étudiantes et aux étudiants tenant compte d’un certain nombre d’exigences techniques comme résultat d’une analyse de besoins. La formation a été développée par prototypage rapide. L’environnement numérique d’apprentissage de la formation inclut des objets d’apprentissage compatibles avec le standard xAPI pour un suivi des apprentissages très fin. Ces données, couplées à un questionnaire destiné aux utilisateurs participants à l’expérimentation, permettent d’évaluer l’usage et la pertinence des modules de la formation. Cette première expérience d’analytique de données de formation nous permet d’évaluer cet appareillage technique (xAPI et LRS) en soulignant ses possibles applications pour l’amélioration du dispositif de formation.
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Delgado, Carlos A., Víctor M. Sánchez, Pablo M. Velásquez, Roberto L. Shimabuku, and Luis Huicho. "Non-clinical performance and acceptability of a small portable respiratory stimulator device for basic neonatal resuscitation." Anales de la Facultad de Medicina 80, no. 3 (2019): 298–304. http://dx.doi.org/10.15381/anales.803.15994.
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Introduction: Neonatal resuscitation demands equipment for respiratory support not always available in rural areas. Innovative devices are required, and rapid prototyping allows to generate them using three-dimensional (3D) designs and printers. Objective: To evaluate the non-clinical performance and the acceptability by health personnel of a neonatal respiratory device produced by rapid prototyping. Methods: Observational study, descriptive, of proof of concept developed in two steps. Step 1: Manufacture of the device with rapid prototyping in three-dimensional (3D) scanners and printers. Step 2: Demonstration of the invention during training programs in neonatal resuscitation for health personnel in three regions of Peru (Tarapoto, Huánuco and Ayacucho). In both steps, we evaluated the performance of the device connected to a gas flow analyser. A survey was administered to the health workers of Tarapoto and Ayacucho to know their acceptability. Results: The developed prototype is T-shaped with two side bellows that, when pressed with one hand, project air through the centre towards a facial adapter. The use of the prototype in the laboratory generated an average air flow of 4.8 Lt /min (SD ± 1.7) and an average pressure of 5.9 cmH2O (SD ± 1.4). This device was considered to be “very simple to use” in an acceptability survey involving 39 nurses and 11 doctors in remote areas of the capital of Peru. Conclusions: The evaluated prototype is acceptable by the staff and has a performance capable of generating spontaneous breathing at birth.
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Durgun, Ismail. "Sheet metal forming using FDM rapid prototype tool." Rapid Prototyping Journal 21, no. 4 (2015): 412–22. http://dx.doi.org/10.1108/rpj-01-2014-0003.
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Purpose – The purpose of this paper is to investigate usage of fused deposition modeling (FDM)-based sheet metal tooling for small lot productions as a real case. FDM-based sheet metal tooling was used for stamping prototype parts for two different materials to evaluate dimensional conformance. Design/methodology/approach – The experimental process of data capture used the following steps: sheet metal parts were stamped and optically scanned at every 10th interval for both DC04 and S355MC material. FDM-based upper and lower dies were optically scanned at 1st, 51st and 101st intervals. Dimensional conformance analyses were carried out by using scanned data to evaluate the behavior of FDM dies against DC04 and S355MC materials in terms of geometric deviation. Findings – Satisfactory results were obtained for DC04 material by using FDM-based tooling, and overall deviation was at an acceptable level in terms of production tolerance. S355MC material is harder than DC04 and results were not convenient in terms of tolerance range. Geometric deviation of FDM dies was slightly increased and after the 50th part, increased drastically due to squeezing of FDM layers. Experiments showed that this method can be used for DC04 material and up to 100 parts can be stamped within the tolerance range. Using FDM-based sheet metal tooling, product development phase can be shortened in terms of leading time. Originality/value – This paper presents a study to create an alternative tooling method to shorten product cycle and product development phase by integrating rapid tooling methods to low-volume production.
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Fried, Cheneler, Monk, Taylor, and Dodds. "Compact Viscometer Prototype for Remote In Situ Analysis of Sludge." Sensors 19, no. 15 (2019): 3299. http://dx.doi.org/10.3390/s19153299.
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On the Sellafield site there are several legacy storage tanks and silos containing sludge of uncertain properties. While there are efforts to determine the chemical and radiological properties of the sludge, to clean out and decommission these vessels, the physical properties need to be ascertained as well. Shear behaviour, density and temperature are the key parameters to be understood before decommissioning activities commence. However, limited access, the congested nature of the tanks and presence of radioactive, hazardous substances severely limit sampling and usage of sophisticated characterisation devices within these tanks and therefore, these properties remain uncertain. This paper describes the development of a cheap, compact, and robust device to analyse the rheological properties of sludge, without the need to extract materials from the site in order to be analysed. Analysis of a sludge test material has been performed to create a suitable benchmark material for the rheological measurements with the prototype. Development of the device is being undertaken with commercial off the shelf (COTS) components and modern rapid prototyping techniques. Using these techniques, an initial prototype for measuring shear parameters of sludge has been developed, using a micro-controller for remote control and data gathering. The device is also compact enough to fit through a 75 mm opening, maximising deployment capabilities.
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Yu, Dong Man, Di Wang, and Xiao Jing Li. "Mechanical Performance Study for Rapid Prototyping of Selective Laser Sintering." Applied Mechanics and Materials 556-562 (May 2014): 557–60. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.557.
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Selective laser sintering (SLS) is an additive manufacturing technique used for the low volume production of prototype models and functional components.The lower strength of prototype parts might leads to bad finished quality. In this study, author used the coated sand casting as the material of selective laser sintering experiment, studied the processing temperature and time on the mechanical properties of post-processing, and the influence on gas-forming property and collapsibility of the pieces. And combined with casting experimental we can analyze the accuracy influence factors of precoated sand sintering parts and other performance assessment. Through analysis, it indicates that the post-processing of temperature influences on tensile strength of coated sand specimens under three different insulation temperature conditions.
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Pysz, Stanisław, and Robert Żuczek. "The Analysis of Prototype Cast Constructions and the Assessment of their Technological and Exploitation Properties." Solid State Phenomena 237 (August 2015): 215–20. http://dx.doi.org/10.4028/www.scientific.net/ssp.237.215.
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The article describes the application of various methods of rapid prototyping for manufacturing of prototype castings. This technology assumes that the properties of such a casting are similar to properties of a casting obtained in serial production involving die-casting technologies or high pressure die casting. However, other conditions of metal preparation, pouring, and the solidification process, related to the specificity of manufacturing of a single casting with the application of rapid prototyping, as compared to serial production generate different final properties. Numerical simulations of exploitation conditions, with the use of Ansys and Abaqus software, were conducted for selected constructions taking into account the final properties of a casting. MAGMASoft software was used for the analysis of the technological process for manufacturing of prototype castings, as well as in serial production. The article describes the consecutive stages for manufacturing of selected prototype castings - from the moment of designing to manufacturing of a ready-made element. The selected elements were produced with the use of rapid prototyping with a 3D Z-Corp printer and a FDM Titan machine, and then model sets were prepared for casting with the application of the lost wax casting technique.The conducted analysis was aimed at defining methodology for manufacturing prototype castings with the use of numerical simulation tools, especially the implementation of boundary conditions achieved as a result of solidification analysis and techniques of rapid prototyping. It was stated that final properties of a prototype casting and a serial casting may be different, which may impact the assessment of the construction under development. The use of numerical calculations for the assessment of a prototype and serial construction with exploitation parameters broadens the expertise with final properties of the analysed construction.
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Ibrahim, Mustaffa, and M. N. Hafsa. "Studies on Rapid Prototyping Pattern Using PLA Material and FDM Technique." Applied Mechanics and Materials 465-466 (December 2013): 1070–74. http://dx.doi.org/10.4028/www.scientific.net/amm.465-466.1070.
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The development of Rapid Prototyping (RP) gave the consumer the ability to form prototype or a component of the prototype that can be directly used in assemblies and product testing for short or medium production with the least time consumed. The purpose of this paper is to study the dimensional accuracy and surface roughness for RP part as a master pattern for Investment Casting (IC) process. The material that been used is Polylactic acid (PLA) using a technique of Fused Deposition Modeling (FDM). The effects of internal pattern structure and part orientation during fabrication on the part master pattern can analyze from the response analysis. Results shows that PLA/FDM produced better accuracy and surface roughness when the part is fabricated with internal pattern structure compare to hollow structure. The internal pattern structures improved the quality of part and capable to supporting the design so that less warping or shrink. Part that built with 90o part orientation produced better accuracy and surface roughness compare to 0o part orientation.
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Barrios-Muriel, Jorge, Francisco Romero-Sánchez, Francisco Javier Alonso-Sánchez, and David Rodríguez Salgado. "Advances in Orthotic and Prosthetic Manufacturing: A Technology Review." Materials 13, no. 2 (2020): 295. http://dx.doi.org/10.3390/ma13020295.
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In this work, the recent advances for rapid prototyping in the orthoprosthetic industry are presented. Specifically, the manufacturing process of orthoprosthetic aids are analysed, as thier use is widely extended in orthopedic surgery. These devices are devoted to either correct posture or movement (orthosis) or to substitute a body segment (prosthesis) while maintaining functionality. The manufacturing process is traditionally mainly hand-crafted: The subject’s morphology is taken by means of plaster molds, and the manufacture is performed individually, by adjusting the prototype over the subject. This industry has incorporated computer aided design (CAD), computed aided engineering (CAE) and computed aided manufacturing (CAM) tools; however, the true revolution is the result of the application of rapid prototyping technologies (RPT). Techniques such as fused deposition modelling (FDM), selective laser sintering (SLS), laminated object manufacturing (LOM), and 3D printing (3DP) are some examples of the available methodologies in the manufacturing industry that, step by step, are being included in the rehabilitation engineering market—an engineering field with growth and prospects in the coming years. In this work we analyse different methodologies for additive manufacturing along with the principal methods for collecting 3D body shapes and their application in the manufacturing of functional devices for rehabilitation purposes such as splints, ankle-foot orthoses, or arm prostheses.
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LARASATI, ZARA, Kunto Imbar Nursetyo, and Cecep Kustandi. "Pengembangan Flipped Classroom Untuk Mata Kuliah Belajar Berbasis Komputer di Universitas Negeri Jakarta." Jurnal Pembelajaran Inovatif 2, no. 2 (2019): 123–32. http://dx.doi.org/10.21009/jpi.022.06.
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This development research aims to produce flipped classroom learning in universities generally, especially to computer-based learning courses. Products development included lecture syllabus, guide and course site. The objectives of this study were computer-based study lecturers and first year of educational technology students. This research development is used as a rapid prototype development model that has five stages, namely, assess needs & analyze content, set objectives, construct prototype, utilize prototype, install and maintain system. The evaluation in this study was carried out through expert reviews, namely learning design experts, material experts, and media experts. The average value obtained form learning design expert is 3.7. The average value obtained from material experts is 3.8. The average value obtained form of media experts is 3.3. Through the three evaluations that have been carried out, it can be summarized that the development of flipped classroom learning for computer-based learning courses has been very good and can be utilized by lecturers.
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Moss, Robb Eric S., and Victor A. Crosariol. "Scale Model Shake Table Testing of an Underground Tunnel Cross Section in Soft Clay." Earthquake Spectra 29, no. 4 (2013): 1413–40. http://dx.doi.org/10.1193/070611eqs162m.
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Underground structures exist in many active earthquake regions, but empirical data of the seismic behavior of these structures is very limited. This research works toward filling that empirical data gap with scale model shake table testing. Underground seismic soil-structure interaction (USSSI) effects were investigated for a stiff tunnel embedded within soft clay. Young Bay mud was used as a prototype soil for developing a scale model soil mixture. A Bay Area Rapid Transit (BART) cut-and-cover subway tunnel was used as the prototype for the one-tenth scale model subway cross section. The flexible wall test container in these tests allowed the soil to deform in simple shear. Similitude analysis scaled critical variables to properly capture prototype behavior at the model scale subjected to 1-g shake table testing. The measured horizontal “racking” distortions of the model structure compared to numerical analyses suggest that current simplified design methods may overestimate distortions in soft-soil/stiff-structure situations.
Dissertations / Theses on the topic "Prototypage rapide – Analyse"
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Asadollahiyazdi, Elnaz. "Integrated Design of Additive Manufacturing Based on Design for Manufacturing and Skin-skeleton Models." Thesis, Troyes, 2018. http://www.theses.fr/2018TROY0026.
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Aujourd'hui, la fabrication additive (FA) fait évoluer le monde de la fabrication grâce à ses capacités de production de formes complexes couche par couche. L'approche de conception pour la fabrication (DFM) aide à considérer les contraintes de FA et à maîtriser les caractéristiques du produit dans la gestion de son cycle de vie. Plusieurs études sont consacrées à l'approche de conception intégrée pour la FA, mais aucune approche ne prend en compte toutes les étapes du cycle de vie du produit dans le niveau d'optimisation de sa conception et de sa fabrication. Ainsi, cette thèse fournit une approche DFM pour la FA afin d'étudier simultanément différents attributs, contraintes et critères de conception et de fabrication dès la définition du produit. L'approche Peau-Squelette modélise la première définition du produit. Il contient une analyse fonctionnelle, un modèle d'usage et un modèle de fabrication. Dans ce travail, un nouveau moteur de résolution, qui agit à l’interface du modèle de produit et du modèle de fabrication, est proposé grâce à l'analyse des technologies FA et de leurs paramètres et critères. Ce moteur repose sur un problème d'optimisation bi-objectif pour minimiser le temps de production et la masse du matériau en proposant les solutions optimales pour les propriétés mécaniques et la rugosité du produit. Cette méthodologie permet de définir le modèle de produit. L'approche est mise en œuvre à travers une première technologie de dépôt par fil fondu (FDM) pour la production de deux études de cas<br>Nowadays, Additive Manufacturing (AM) evolves the manufacturing world by its capabilities for production of the complex shapes layer by layer. Design For Manufacturing (DFM) approach helps to overcome the AM constraints and mastering product features in product lifecycle. Several studies are devoted to integrated design approach for AM, but there is no approach that considers all product life cycle steps in optimization level for product and manufacturing process. So, this thesis provides a DFM approach for AM to investigate simultaneously different attributes, constraints, and criteria of design and manufacturing in product definition. Skin-Skeleton approach models the first definition of product and AM. It contains functional analysis, usage model, and manufacturing model. In this work, a novel interface processing engine as an interface between product and manufacturing model is developed through analysis of AM technologies and their parameters and criteria. This engine relies on a bi-objective optimization problem to minimize production time and material mass under limitation of mechanical properties and roughness of the product to obtain the optimal manufacturing parameters. This methodology permits to define the product model. The approach is implemented into Fused Deposition Modeling to verify the methodology through two case studies
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Chabot, Alexia. "Méthodologie de monitoring multiphysique des procédés DED : développement par une démarche expérimentale." Thesis, Ecole centrale de Nantes, 2020. http://www.theses.fr/2020ECDN0022.
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La Fabrication Additive métallique apporte de nouvelles possibilités de fabrication et de liberté de conception des pièces fonctionnelles métalliques par rapport aux procédés conventionnels. En particulier, les technologies Direct Energy Deposition (DED), notamment les procédés Laser Metal Deposition (LMD) et Wire-Arc Additive Manufacturing (WAAM) fusionnent directement la matière et la déposent couche par couche pour réaliser une pièce. Actuellement, ces procédés sont majoritairement mis en œuvre en boucle ouverte. Ainsi, l’obtention d’une pièce conforme aux exigences du cahier des charges résulte le plus souvent d’une méthode essai-erreur. Afin d’améliorer la maitrise des procédés DED et de s’affranchir de cette méthode essai-erreur, la simulation numérique et le monitoring sont les principales pistes investiguées dans la littérature. Cette thèse propose une méthodologie générique de monitoring multiphysique, basée sur quatre boucles de contrôle indépendantes et pouvant être mises en œuvre simultanément. Ces boucles de contrôle se focalisent sur la température, la géométrie et la santé matière de la pièce, ainsi que sur le Stick Out. Dans ces travaux, les boucles de contrôle ont été principalement implémentées sur le procédé WAAM. Un soin particulier a été porté sur leur développement pour rendre ces boucles de contrôle adaptables au procédé LMD. Parallèlement à ces travaux, certains outils numériques existants ont été évalués dans l’optique d’être intégrés dans l’environnement de fabrication aux côtés du monitoring. Cette thèse s’inscrit dans le cadre du laboratoire commun Joint Laboratory of Marine Technology regroupant Naval Group et Centrale Nantes<br>Additive Manufacturing (AM) is a promising technology compared to subtractive processes, in terms of cost or freedom of manufacturing functional parts. Among the AM techniques, Laser Metal Deposition (LMD) and Wire-Arc Additive Manufacturing (WAAM), included in the Direct Energy Deposition (DED) processes, manufacture parts by directly melting the material in a layer-by-layer maner. Those processes are currently mainly operated in open-loop. Thus, an acceptable part regarding the specified specifications is often the result of a trial-and-error method. In order to improve DED processes performances and to get rid of this trial-and-error method, monitoring and numerical simulation are the most widely investigated solutions. These PhD works propose a generic multiphysic monitoring methodology, based on four independant control loops which can be operated simultaneously. Those control loops are dedicated to the part temperature, geometry, and structural health, and the Stick Out. In these PhD works, control loops have been mainly implemented on the WAAM process, and a specific attention has been devoted to their developments to ensure their applicability to the LMD process. Concurrent to these monitoring develoments, an evaluation of some existing numerical tools has been conducted, in order to integrate simulation together with monitoring in a manufacturing environement. This PhD project is part of the Joint Laboratory of Marine Techology formed by Naval Group and Centrale Nantes
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Augusto, Vincent. "Modélisation, analyse et pilotage de flux en milieu hospitalier à l'aide d'UML et des réseaux de Petri." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2008. http://tel.archives-ouvertes.fr/tel-00473565.
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La modélisation et l'analyse de systèmes hospitaliers sont traditionnellement réalisées en utilisant méthodes et outils issus du génie industriel. Cependant, les caractéristiques de ces systèmes sont difficiles à capturer avec les outils de modélisation et de simulation classiques. Notre objectif est de spécifier et de développer une plate-forme de modélisation et de simulation dédiée aux systèmes hospitaliers, appelée medPRO (medical Process-Resource-Organisation), accompagnée d'une méthodologie d'analyse adaptée au domaine médical. Cette plate-forme est construite autour d'un cadre de modélisation et d'un guide méthodologique conçus pour un système hospitalier particulier. UML (Unified Modelling Language) a été choisi pour la modélisation de ces systèmes. Plusieurs points de vue sont proposés : Processus (vue centrée sur le patient), Ressource (comportement des ressources humaines et matérielles), et Organisation (relation entre les intervenants). Le comportement dynamique du modèle est spécifié grâce à une classe dédiée de réseaux de Petri, appelés réseaux de Petri de Santé : un algorithme de simulation à événements discrets a également été développé pour les réseaux de Petri. Une large partie de ce travail est dédiée au système de décision, qui est utilisé (i) pour appliquer des méthodes de planification et d'ordonnancement issues du génie industriel à des systèmes hospitaliers, et (ii) pour piloter le déroulement de la simulation en temps réel au travers d'une approche hybride hiérarchique/hétérarchique. Trois études de cas sont également présentées pour montrer l'efficacité de la plateforme medPRO : nous nous sommes intéressés à l'unité neuro-vasculaire, à la pharmacie et au bloc opératoire du CHU de Saint-Etienne (France). Plusieurs outils d'optimisation spécifiques ont été développés et inclus dans la plate-forme.
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Odinot, Julie. "Développement de la fabrication additive directe par DED-CLAD : de la poudre à la mise en forme de pièces céramiques denses." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLN059.
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Les techniques d’élaboration de matériaux par fabrication additive (FA) sont en plein essor [1]. Elles permettent de fabriquer des pièces par ajout de matière, en opposition avec les techniques traditionnelles par soustraction de matière (usinage). Il existe à l’heure actuelle de nombreux procédés de FA, adaptés à différentes applications : fusion ou frittage par faisceau d’électrons ou par laser, dépôt de matière direct ou en lit de poudre… Ces procédés ont été bien développés pour des matériaux polymères puis métalliques. Des techniques de FA de matériaux céramiques via des polymères chargés ont également vu le jour, mais celles-ci nécessitent des traitements postérieurs (cycles de déliantage, frittage) [2]. Les matériaux céramiques denses sont encore peu développés en fabrication additive en raison de la fissuration de ces matériaux lors de leur élaboration.La technologie CLAD (Construction Laser Additive Directe), développée par IREPA-LASER, permet la fabrication de pièces par dépôt de matière fondue. Le matériau sous forme de poudre est acheminé via une buse laser et projeté dans le faisceau. Il est ainsi porté à la température de fusion. La fusion successive de plusieurs couches permet l’obtention de la pièce. Cette technique, en plus de n’utiliser que la matière nécessaire (contrairement aux techniques de fabrication par lit de poudre), permet la fabrication de pièces de grandes dimensions, voire en multi-matériaux. Cette technologie est, pour l’heure, dédiée aux matériaux métalliques.L’objet de ce sujet de thèse, en partenariat entre l’ONERA et IREPA-LASER dans le cadre du projet inter-Carnot CLADIATOR, est d’étudier la FA de matériaux céramiques denses par le procédé CLAD®. Cette étude porte ainsi sur le procédé dans son ensemble, des matières premières aux pièces finales, en passant par l’adaptation du moyen de fabrication aux contraintes spécifiques liées aux matériaux céramiques.Les matières premières exigent d’être adaptées au procédé ; les deux principales difficultés étant la coulabilité de la poudre, nécessaire pour son acheminement dans la buse, et l’absorption de la source laser par le matériau pour sa montée en température. En parallèle de la caractérisation des matières premières (granulométrie, MEB, dilatométrie, DRX…), des essais d’atomisation par séchage seront effectués pour optimiser la coulabilité des poudres [3]. Ce procédé d’atomisation permet d’obtenir des poudres sous forme d’agglomérats sphériques de plus petites particules ; leur forme est régulière, mais elles restent poreuses. L’ajout de dopants sera étudié pour améliorer l’absorption du signal, en adéquation avec une éventuelle adaptation du laser. Les matériaux considérés sont l’alumine, la zircone ainsi que des compositions eutectiques d’alumine-zircone.La principale difficulté de ce sujet réside dans la sensibilité à la fissuration des matériaux céramiques, en raison du fort gradient thermique induit par le chauffage local du laser et le refroidissement de la pièce. Des solutions de chauffage de la pièce et/ou du matériau avant et après le dépôt seront étudiées pour limiter les contraintes thermomécaniques subies par le matériau [3,4].La machine devra également être modifiée pour supporter les températures élevées nécessaires à l’élaboration de céramiques (températures de fusion et dispositif de pré/post chauffage). L’étude et l’optimisation de ces solutions seront effectuées à l’aide de modélisations multi physiques sur le logiciel COMSOL en collaboration avec IREPA-LASER.Enfin, l’influence du procédé d’élaboration sur l’état des pièces réalisées sera étudiée grâce à des caractérisations microscopiques, mécaniques, thermiques…<br>This work, in partnership between the ONERA Materials and Composite Structure Department (DMSC) and IREPA Laser within the CLADIATOR project, is based on the study of direct additive manufacturing of dense ceramic materials by direct melt deposition (also known as laser cladding) process. This process enables high dimensions or even multi-materials part manufacturing.It will deal with the adaptation of raw materials (ceramic powders) to the existing machine, especially in the case of powder flowability and optical absorption. Indeed, the powder flowability enables its transportation up to the laser nozzle, while the optical absorption of the laser signal is necessary to allow its melting.In parallel, the existing machine also needs to be adapted to ceramic materials : the main difficulty of this work will be the occurence of cracks during the manufacturing. This phenomena is due to the local heating by the laser and the materials brittleness. That’s why some secondary heating solutions, before or after the melt, will have to be defined to decrease the thermal gradient in the material while processing. Those solutions will be discussed between Onera and Irepa Laser, based on FEM simulations established with COMSOL Multiphysics software.Finally, the elaboration process influence on the manufactured ceramics parts will be investigated with microscopy, mechanical and thermal characterization
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Kiepas, Patryk. "Analyses de performances et transformations de code pour les applications MATLAB." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEM063.
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MATLAB est un environnement informatique doté d'un langage de programmation simple et d'une vaste bibliothèque de fonctions couramment utilisées en science et ingénierie (CSE) pour le prototypage rapide. Cependant, certaines caractéristiques de son environnement, comme son langage dynamique ou son style de programmation interactif, affectent la rapidité d'exécution des programmes. Les approches actuelles d'amélioration des programmes MATLAB traduisent le code dans des langages statiques plus rapides comme C ou Fortran, ou bien appliquent systématiquement des transformations de code au programme MATLAB sans considérer leur impact sur les performances. Dans cette thèse, nous comblons cette lacune en développant des techniques d'analyse et de transformation de code des programmes MATLAB afin d'augmenter leur performance. Plus précisément, nous analysons et modélisons le comportement d'un environnement MATLAB black-box uniquement en mesurant l'exécution caractéristique des programmes sur CPU. À partir des données obtenues, nous formalisons un modèle statique qui prédit le type et l'ordonnancement des instructions programmées lors de l'exécution par le compilateur Just-In-Time (JIT). Ce modèle nous permet de proposer plusieurs transformations de code qui améliorent les performances des programmes MATLAB en influençant la façon dont le compilateur JIT génère le code machine. Les résultats obtenus démontrent les avantages pratiques de la méthodologie présentée<br>MATLAB is a computing environment with an easy programming language and a vast library of functions commonly used in Computation Science and Engineering (CSE) for fast prototyping. However, some features of its environment, such as its dynamic language or interactive style of programming affect how fast the programs can execute. Current approaches to improve MATLAB programs either translate the code to faster static languages like C or Fortran, or apply code transformations to MATLAB code systematically without considering their impact on the performance. In this thesis, we fill this gap by developing techniques for the analysis and codetransformation of MATLAB programs in order to improve their performance. More precisely, we analyse and model the behaviour of the black-box MATLAB environment by measuring the execution characteristics of programs on CPU. From the resulting data, we formalise a static model which predicts the type and order of instructions scheduled by the Just-In-Time (JIT)compiler. This model allows us to propose several code transformations which increase the performance of MATLAB programs by influencing how the JIT compiler generates the machine code. The obtained results demonstrate the practical benefits of the presented methodology
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Brăileanu, Patricia-Isabela. "Research on optimizing customized prostheses." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI062.
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La thèse de doctorat intitulée " Research on optimizing customized prostheses " a pour objectif final de développer un logiciel qui modifie la géométrie d'une tige fémorale en fonction de paramètres prédéterminés après l’analyse des images tomographiques du patient. Afin d'obtenir des résultats, ont été réalisées les études suivantes : Des images tomographiques ont été obtenues de patients avec une hanche saine, de patients avec une hanche arthritique et de patients avec prothèse totale de hanche ; Une planification virtuelle de l'opération de remplacement total de la hanche a été réalisée pour construire une prothèse personnalisée et identifier les paramètres qui peuvent être optimisés ; Des études FEA ont été réalisées sur les tiges prothétiques standard et sur la tige prothétique personnalisée pour observer le comportement mécanique de la prothèse sujet à différentes charges externes ; Après avoir interprété les résultats, nous avons poursuivi le développement du logiciel, son objectif sera l’impression de la tige fémorale personnalisée par la technique de fabrication additive<br>This thesis aims to develop a virtual surgery planning methodology starting from the traditional Total Hip Replacement preoperative planning and having as final goal the realization of a template prosthesis that can be customized according to the femoral landmarks of each patient. Starting from the traditional preoperative planning of THR, which is done on the patients’ X-Ray and using the same principles of obtaining femoral landmarks, the CT scans of a patient with hip joint related disease that need to undergo a THR surgery were segmented by using specific algorithms in order to extract the patients’ femur and after that was imported in dedicated CAD software in which, with the help of evaluation instruments, all the patients’ femoral landmarks were identified. These femoral landmarks were used to develop a custom prosthesis starting from a standard anatomical femoral stem, which was validated using FEA simulations. Based on the information obtained, the development of a software coded in Python language was done to create somehow a tool that allows the analysis of patients’ CT scans in MPR view, but also in 3D view. It allows the bone segmentation of the affected area in order to obtain a CAD model file and perform the virtual preoperative planning in a CAD dedicated software, and finally use some of these dimensions in order to personalize a custom hip stem based on a pre-existing stem model used as basis for the desired geometrical transformations. The work is completed by printing it with FDM technology, using a biocompatible material to demonstrate the potential of this study, the versatility and the possibility of orienting the femoral stems used in THR towards personalization and AM, avoiding the use of standard prostheses that can lead to postoperative complications and thus leading to the elimination of prostheses “banks” due to the fact that they would no longer be necessary
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Zhu, Yijun. "Contribution à l’évaluation et à la modélisation du bien-être des matériaux textiles habillement par l’utilisation des techniques de calcul avancé." Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10119/document.
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Aujourd’hui, stressés par des pressions multiples du travail et de la vie quotidienne, les consommateurs aspirent résolument au bien-être. En même temps, face à la concurrence de plus en plus intensive, l’exploitation des besoins des consommateurs et le développement de nouveaux produits personnalisés à réactivité rapide et au coût réduit constituent des stratégies prioritaires pour la plupart des entreprises industrielles. Dans cette situation, la maîtrise des descripteurs sensoriels et émotionnels des produits autour de la notion du bien-être permettra de satisfaire au maximum les spécifications et la cohérence de l’image véhiculée par la marque ainsi que les attentes de plus en plus complexes issues de l’analyse du marché.Dans le but d’apporter notre contribution aux outils du « prototypage rapide » et à l’écoute des besoins industriels, ce mémoire présente les travaux de recherche sur la caractérisation des critères du bien-être des consommateurs dans le domaine textile et d’habillement, permettant de réaliser rapidement des prototypes adaptés aux leurs besoins. Une série d’outils est proposée, constituant un système d’aide à la décision, permettant aux concepteurs de sélectionner des paramètres physiques de conception pertinents, de déterminer les espaces de fonctionnement (les intervalles acceptables des paramètres physiques de conception sélectionnés), de modéliser la relation entre le bien-être et les composants de conception (toucher, style et couleur), et d’évaluer globalement la qualité des prototypes sur plusieurs niveaux d’appréciation<br>Today, anxious by multiple pressures of job and daily life, consumers aspire resolutely to the well-being. At the same time, with more and more intensive competition, the exploitation of consumer requirements and the development of new personalized products with quick reactivity and reduced expense constitute priority strategies for most of the industries. In this situation, the mastery of the sensory and emotional descriptors of products around the well-being will allow to satisfy at the maximum the specifications and coherence of the brand image as well as more and more complex expectation concluded by the market analysis.To contribute in the « rapid prototyping » tools and satisfy the industrial requirements, this thesis introduces research works on the characterization of criteria of the consumers well-being in textile and apparel field, allowing to realise prototypes adapted to their requirements rapidly. A series of tools are proposed, constituting a decision support system, allowing the designers to choose appropriate physical design parameters, to determine the feasible operation setting space (the setting interval of the chosen physical design parameters), to model the relationship between well-being and design components (fabric hand, style and color), and to evaluate globally the quality of prototypes at several levels
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Schmidt, Martin-Pierre. "Computational generation and optimization of mechanical structures On structural topology optimization using graded porosity control Structural topology optimization with smoothly varying fiber orientations." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMIR01.
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Cette thèse étudie et développe des méthodes de modélisation mathématique, analyse et optimisation numérique appliquées à la génération d’objets 3D. Les approches proposées sont utilisées pour la génération de structures lattices et de structure continue par optimisation topologique<br>This thesis studies and develops methods for mathematical modeling, numerical analysis and optimization applied to the generation of 3D objects. The proposed approaches are used to generate lattice structures and continuum structures with topology optimization
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Gunenthiram, Valérie. "Compréhension de la formation de porosités en fabrication additive (LBM). Analyse expérimentale de l’interaction laser – lit de poudre – bain liquide." Thesis, Paris, ENSAM, 2018. http://www.theses.fr/2018ENAM0028/document.
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Le procédé de fusion sélective « lit de poudre » (SLM) permet d'élaborer des pièces métalliques bonne matière (denses) directement à partir de la fusion de couches de poudres successives. De nombreux problèmes techniques doivent encore être surmontés pour faire du SLM un processus de fabrication entièrement viable. C'est le cas de l’état de surface et de l'apparition systématique de porosités, qui nécessitent des étapes de post-traitements. Jusqu'à présent, l'origine de la porosité reste incertaine mais est supposée être liée à la stabilité du procédé. Cette thèse propose une étude originale de l'interaction laser-poudre-bain liquide sur 316L et sur deux alliages d’aluminium (5086 et 4047) avant d’étudier les conditions de densification de la matière. Le travail de cette thèse s’articule en deux parties. Dans la première partie, une étude expérimentale de l’interaction laser-matière a été effectuée sur un banc instrumenté à partir d’imagerie par caméra rapide (>10 000 images /s). Les conditions de formation des éjections métalliques, de dénudation en poudre, l’hydrodynamique des zones fondues (dont le humping) ont été caractérisées et quantifiées. Tous ces phénomènes sont liés aux fortes densités de puissance utilisées en SLM, qui favorisent le régime de keyhole et la vaporisation. La deuxième partie de ce travail de thèse a consisté à évaluer l’origine et le taux de porosités sur une machine SLM. Une formulation analytique de la densification, dépendante d’un paramètre énergétique VED, a été validée par une étude expérimentale de l’évolution du taux de porosité, quelle que soit l’épaisseur de poudre. Un premier lien a été réalisé entre les dimensions des cordons de fusion et les conditions de densification. Enfin, une forte interaction (diffusion de Rayleigh ou absorption) a été observée entre le faisceau laser incident et les nanoparticules contenues dans la colonne de vapeur métallique, à l’origine de la dispersion importante des profondeurs de fusion<br>The selective laser melting (SLM) process allows to produce dense metal parts directly from the melting of successive powder layers. However, many technical issues are still to overcome for making SLM a fully viable manufacturing process. This is the case of surface finishing and the systematic occurrence of porosities, which require post machining steps. Up till now, the origin of porosities remains unclear but is expected to be related to the stability of the process. This thesis proposes an original study of the laser-powder-melt pool interaction on 316 L and on two aluminum alloys (5086 and 4047) before studying the material’s densification conditions. The work is structured in two parts. In the first part, an experimental study of the laser-matter interaction has been carried out on an instrumented SLM setup equipped with a fast camera (>10 000 images /s). The conditions of formation of metal ejections, denudation and hydrodynamics of melt pool (including humping) have been characterized and quantified. All these phenomena are related to the high power densities used in SLM, which favor keyhole regime and vaporization. The aim of the second part of this work was to characterize the origin and the porosity fraction on an SLM machine. A first correlation has been made between the dimensions of the fusion beads and the densification conditions. A strong interaction (Rayleigh scattering or absorption) has been observed between the incident laser beam and the nanoparticles contained in the metal vapor column: this interaction is responsible for the significant dispersion of melting depths
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Hong, Yan. "Développement d’un système intelligent d’aide à la création de vêtements personnalisés pour des personnes à morphologie atypique par exploitation de connaissances." Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1I014/document.
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Ce projet de recherche de doctorat vise à développer un nouveau Système d’Aide à la Conception de Vêtement Personnalisé (PGDSS en Anglais) pour les personnes à morphologie atypique (PWAM en Anglais). Ce système nous permet de développer rapidement des vêtements adaptés à leurs besoins fonctionnels, expressifs et esthétiques (FEA en Anglais) et à leurs morphologies atypiques. Afin de réaliser le PGDSS proposé, deux sous-systèmes sont développés: un Système de Recommandation de Mode Personnalisée (PFRS en Anglais) et une Plate-Forme Virtuelle de Prototypage de Vêtement 3D/2D (VGPP en Anglais). Le PFRS est conçu pour sélectionner les solutions de vêtement personnalisées les plus pertinentes en termes de couleur, de tissu et de style, tandis que le VGPP permet de créer rapidement des vêtements virtuels en fonction de leurs critères de conception (profils de produits), de les ajuster ensuite. Le PGDSS proposé peut être entièrement utilisé en ligne, il est alors connecté à une plate-forme E-commerce de vêtement. Mais il peut aussi être connecté à un système de fabrication de vêtements automatique hors ligne.Les facteurs de conception pour les vêtements personnalisés ont été identifiés et analysés dans ma recherche de doctorat. Les nouveaux produits générés par le système proposé répondront aux exigences et aux fonctions spécifiques imposées par les personnes à morphologie atypique en termes d'ergonomie, de biophysique, de psychologie, d'esthétique, de confort et de commodité. Le système proposé est capable d'offrir des designs à forte personnalisation à un faible coût pour un marché de vêtement dont la demande est en hausse. Ce qui fait la distinction avoir les produits existants du marché est que nous prenons en compte l’ensemble des exigences de ce type de consommateur par un produit entièrement personnalisé<br>This PhD research project aims at developing a new Personalized Garment Design Support System (PGDSS) for People with Atypical Morphology (PWAM). This system enables to quickly develop garments adapted to their special Functional, Expressive and Aesthetic (FEA) needs and atypical morphologies. In order to realize the proposed PGDSS, two subsystems are developed: the Personalized Fashion Recommendation System (PFRS) and Virtual 3D-to-2D Garment Prototyping Platform (VGPP). The PFRS is developed for selecting the most relevant personalized garment design solutions in terms of color, fabric and style, while the VGPP enables designers to quickly create virtual garments according to their design criteria (product profiles) and visualize them in order to adjust design parameters. The proposed PGDSS can be fully used online. It can be further connected to a garment e-shopping platform or an offline automatic garment manufacturing system.The design factors for personalized garments have been identified and analyzed in my PhD research. The new products generated by the proposed system will meet the specific demands and functions imposed by people with atypical morphology in terms of ergonomics, biophysics, psychology, aesthetics, comfort and convenience. The proposed system is able to offer more personalized designs at low-cost level for highly customized garment market
Books on the topic "Prototypage rapide – Analyse"
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International Workshop on Rapid System Prototyping (9th 1998 Leuven, Belgium). Ninth International Workshop on Rapid System Prototyping: Shortening the path from specification to prototype : proceedings ; Jnue 3-5, 1998, Leuven, Belgium. Edited by Becker J, Glesner Manfred, Lauwereins Rudy, IEEE Computer Society. Technical Committee on Simulation., and IEEE Computer Society. Test Technology Technical Committee. IEEE Computer Society, 1998.
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International, Workshop on Rapid System Prototyping (8th 1997 Chapel Hill N. C. ). 8th IEEE International Workshop on Rapid System Prototyping: Shortening the path from specification to prototype, June 24-26, 1997, Chapel Hill, North Carolina, USA. IEEE Computer Society, 1997.
Find full textBook chapters on the topic "Prototypage rapide – Analyse"
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XianHui, Meng, and Yuan Chong. "X3D-Based Virtual Prototype Robot Mechanism Simulation." In Rapid Automation. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8060-7.ch025.
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This paper mainly studies the goal when using standard X3D robot virtual prototype technology research, design, and kinematics simulation of the body. In the study, the virtual prototype model should be able to satisfy the basic research and design of industrial robot kinematics. Validation X3D technology in the design of virtual prototype of robots can have good effective action. The design of industrial robot virtualization is positive. This work includes X3D technology based on the model, the robot kinematics mathematic model of virtual prototype, and the use of this robot kinematics model using the model analysis of the performance parameters of the robot virtual prototype. This paper solves X3D using the virtual prototype technology robot run to learn some key problems of the simulation of the virtual prototype of robot X3D expression methods (robot virtual body expression, organization, the assembly, and the constraint X3D research). Based on the virtual prototype, X3D is inverse kinematics calculation model.
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Papadopoulos, Fotios, Kerstin Dautenhahn, and Wan Ching Ho. "Behavioral Analysis of Human-Human Remote Social Interaction Mediated by an Interactive Robot in a Cooperative Game Scenario." In Rapid Automation. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8060-7.ch055.
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This book chapter describes the implementation, testing, and evaluation of the first prototype of the “AIBOcom” system, which allows remote users to play an interactive game cooperatively each using a pet-like robot as a social mediator. An exploratory pilot study tested this remote communication system with 10 pairs of participants who were exposed to two experimental conditions characterised by two different modes of synchronisation between the two robots that each interacts locally with the participant. In one mode, the robots incrementally affected each other's behaviour, while in the other, the robots mirrored each other's behaviour. Instruments used in this study include questionnaires, video observations and log files for the game state. The authors used various techniques to measure engagement and synchronization such as quantitative (e.g. rate of occurrence and average values) as well as qualitative measurements. In an exploratory data analysis, these multiple sources of data reflecting participant performance and characteristics were analyzed. Significant correlations were found and presented between the participants as well as participants' preferences and overall acceptance of such communication media. Findings indicate that participants preferred the mirroring mode, and that in this pilot study, robot-assisted remote communication was considered desirable and acceptable to the participants. Furthermore, the existence of interaction variations among different demographic groups was found, while this chapter lists and interprets the most significant effects.
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Žagar, Martin, Branko Mihaljević, and Josip Knezović. "Data Compression as a Base for eHealth Interoperability." In Intelligent Analysis of Multimedia Information. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0498-6.ch010.
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eHealth is a set of systems and services that enable the sharing of medical diagnostic imaging data remotely. The application of eHealth solves the problem of the lack of specialized personnel, unnecessary execution of multiple diagnostic imaging and rapid exchange of information and remote diagnostics. Medical imaging generates large amounts of data. An MRI study can contain up to several Gigabytes (GB). The exchange of such large amounts of data in the local network facilities is a significant problem due to bandwidth sharing which is even more significant in mobile and wireless networks. A possible solution to this problem is data compression with the requirement that there is no loss of data. The goal of this chapter is a conceptual compression prototype that will allow faster and more efficient exchange of medical images in systems with limited bandwidth and communication speeds (cellular networks, wireless networks). To obtain this conceptual compression prototype we will use wavelets.
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Shafik, Amro, and Salah Haridy. "An Integrated Design for a CNC Machine." In Advances in Systems Analysis, Software Engineering, and High Performance Computing. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-6252-0.ch013.
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Computer Numerical Control (CNC) is a technology that converts coded instructions and numerical data into sequential actions that describe the motion of machine axes or the behavior of an end effector. Nowadays, CNC technology has been introduced to different stages of production, such as rapid prototyping, machining and finishing processes, testing, packaging, and warehousing. The main objective of this chapter is to introduce a methodology for design and implementation of a simple and low-cost educational CNC prototype. The machine consists of three independent axes driven by stepper motors through an open-loop control system. Output pulses from the parallel port of Personal Computer (PC) are used to drive the stepper motors after processing by an interface card. A flexible, responsive, and real-time Visual C# program is developed to control the motion of the machine axes. The integrated design proposed in this chapter can provide engineers and students in academic institutions with a simple foundation to efficiently build a CNC machine based on the available resources. Moreover, the proposed prototype can be used for educational purposes, demonstrations, and future research.
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Gomez, Jaime, Alejandro Bia, and Antonio Parraga. "Tool Support for Model-Driven Development of Web Applications." In Integrated Approaches in Information Technology and Web Engineering. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-418-7.ch021.
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This paper describes the engineering foundations of VisualWADE, a CASE tool to automate the production of Web applications. VisualWADE follows a model-driven approach focusing on requirements analysis, high level design, and rapid prototyping. In this way, an application evolves smoothly from the first prototype to the final product, and its maintenance is a natural consequence of development. The paper also discusses the lessons learned in the development of the tool and its application to several case studies in the industrial context.
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ter Veen, James, Shahram Sarkani, and Thomas A. Mazzuchi. "Seeking an Online Social Media Radar." In Social Media and the Transformation of Interaction in Society. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8556-7.ch005.
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In this paper we identify a method, which rapidly analyzes vast amounts of data present in social media in order to forecast crowd sizes. Based upon comparative analysis of related literature, a conceptual model is proposed and research conducted to develop capabilities to forecast mass collective action behavior such as crowd formation using Social Network Analysis (SNA) tools applied to online social media. We demonstrate that a simple model of online social network parameters can produce situation awareness of crowd sizes in much the same way that radar sensors can produce situation awareness of air traffic density. A prototype online social media ‘radar' sensor system is developed and tested in a pilot study with a dataset of tweets gathered regarding the Occupy Wall Street movement. Further work is suggested which could provide anticipated crowd location, movement and intent in addition to size.
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Santos Jr., Eugene, Eunice E. Santos, Hien Nguyen, Long Pan, and John Korah. "Analyst-Ready Large Scale Real Time Information Retrieval Tool for E-Governance." In E-Government Diffusion, Policy, and Impact. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-130-8.ch016.
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With the proliferation of the Internet and rapid development of information and communication infrastructure, E-governance has become a viable option for effective deployment of government services and programs. Areas of E-governance such as Homeland security and disaster relief have to deal with vast amounts of dynamic heterogeneous data. Providing rapid real-time search capabilities for such databases/sources is a challenge. Intelligent Foraging, Gathering, and Matching (I-FGM) is an established framework developed to assist analysts to find information quickly and effectively by incrementally collecting, processing and matching information nuggets. This framework has previously been used to develop a distributed, free text information retrieval application. In this chapter, we provide a comprehensive solution for the E-GOV analyst by extending the I-FGM framework to image collections and creating a “live” version of I-FGM deployable for real-world use. We present a Content Based Image Retrieval (CBIR) technique that incrementally processes the images, extracts low-level features and map them to higher level concepts. Our empirical evaluation of the algorithm shows that our approach performs competitively compared to some existing approaches in terms of retrieving relevant images while offering the speed advantages of a distributed and incremental process, and unified framework for both text and images. We describe our production level prototype that has a sophisticated user interface which can also deal with multiple queries from multiple users. The interface provides real-time updating of the search results and provides “under the hood” details of I-FGM processes as the queries are being processed.
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Saboor, Samrend, Alexander Hörbst, and Elske Ammenwerth. "Modeling and Automated Examination of Communication Processes in Integrated Health Information Systems." In Healthcare Administration. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-6339-8.ch024.
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Modern, integrated information and communication systems (ICT) help improve the communication along processes in hospitals. The goal of this paper is to present a reusable and holistic concept which allows the detailed and systematic description of arbitrary communication processes, as well as the detection of communication errors. This is realized by mapping attributes of communication processes to an entity relationship model respectively database and applying specific, predefined queries on the stored process attributes and their relationships, resulting in the detection of potential communication errors. To develop the authors' concept, they used a methodological approach which was inspired by the concept of Rapid Application Development and adapted in order to develop their model. Furthermore, techniques of qualitative content analysis, as well as expert interviews, were used to develop the authors' approach. The components of their approach have been successfully evaluated with different communication processes and they were able to detect major potential communication errors. To fully proof the authors' concept, further tests with complex communication processes are indicated. Tool-support is on a prototype-level and needs further improvement towards standardization and usability. To transfer their concept from scientific use to daily operation, it is also necessary to further analyze and coordinate the concept with existing approaches from the domain such as business process modeling etc.
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Jagadish and Sumit Bhowmik. "Parameters Optimization of FDM for the Quality of Prototypes Using an Integrated MCDM Approach." In Additive Manufacturing Technologies From an Optimization Perspective. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-9167-2.ch010.
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Fused deposition modeling (FDM) is one of the emerging rapid prototyping (RP) processes in additive manufacturing. FDM fabricates the quality prototype directly from the CAD data and is dependent on the various process parameters, hence optimization is essential. In the present chapter, process parameters of FDM process are analyzed using an integrated MCDM approach. The integrated MCDM approach consists of modified fuzzy with ANP methods. Experimentation is performed considering three process parameters, namely layer height, shell thickness, and fill density, and corresponding response parameters, namely ultimate tensile strength, dimensional accuracy, and manufacturing time are determined. Thereafter, optimization of FDM process parameters is done using proposed method. The result shows that exp.no-4 yields the optimal process parameters for FDM and provides optimal parameters as layer height of 0.08 mm, shell thickness of 2.0 mm and fill density of 100%. Also, optimal setting provides higher ultimate TS, good DA, and lesser MT as well as improving the performance and efficiency of FDM.
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Li, Xining, and Jiazao Lin. "Call U Back." In Modern Entrepreneurship and E-Business Innovations. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-2946-2.ch005.
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Mobile commerce (M-commerce) is an attractive research area due to its relative novelty, rapid growth, and great potential in business applications. Over the last decade, various M-commerce applications have been geared to target mobile users and achieved great success. However, most M-commerce applications are developed by different retailers for special purposes and thus lack fully automated business processes to integrate various existing services. This paper presents a novel infrastructure, Call U Back (CUB), for M-commerce applications. The proposed scheme integrates concepts of agent and context-aware workflow to implement automated trading tasks and compose services dynamically. The context awareness is based on ontology and logic models which derive from a set of descriptive contextual attributes for knowledge sharing and logical inference. Based upon the context-aware workflow analysis, the system will generate automated intelligent agents to conduct commerce transactions on behalf of mobile users. The middleware layer of the CUB server has been implemented. An experimental prototype of the system is under development and testing.
Conference papers on the topic "Prototypage rapide – Analyse"
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Friedman, Alex, Pradeep Raj, and Edward J. Alyanak. "Multidisciplinary Design Space Exploration Using Additive Manufacturing and Rapid Prototype Testing." In 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference. American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-2942.
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Alabey, Peristera, Menelaos Pappas, John Kechagias, and Stergios Maropoulos. "Medical Rapid Prototyping and Manufacturing: Status and Outlook." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24361.
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Rapid Prototyping (RP) has been considered, over the last decades, as a highly promising technology for reducing product development time and cost, as well as for addressing the need for customization and faster response to the market needs. Nowadays this technology is also used widely in medical applications (Medical Rapid Prototyping – MRP), supporting diagnosis and treatment in Neurosurgery, Orthopedic and Dental-Cranio-Maxillo-Facial surgery as well as in Tissue Engineering. The scan data that are usually obtained by Computed Tomography (CT) or Magnetic Resonance Imaging (MRI) are used to build a 3D CAD model of the patient’s pathological region. The 3D model is used to construct the real size prototype using one of the existing RP processes. This assists surgeons in gaining a detailed insight of the problem, making the diagnosis and treatment easier and more reliable. This study presents the current benefits and barriers of Rapid Prototyping and Manufacturing methods and applications in the field of medicine. Most of the recent state-of-art developments and case studies of MRP are presented. Their limitations are discussed along with the challenges to be addressed in the future.
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Lupeanu, Mihaela E., Hadley Brooks, Allan E. W. Rennie, H. Kursat Celik, Corneliu Neagu, and Ibrahim Akinci. "Design for Manufacture Using Functional Analysis and CAD Mould Simulation for Rapid Prototyping and Rapid Tooling." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82410.
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The pressure of time, quality and cost, together with increasing product variety, more customised products and worldwide competition is driving technology development and implementation in the area of Rapid Manufacturing (RM). Traditionally, the manufacture of tooling for both prototype parts and production components represents one of the longest and most costly phases in the development of most new products. The cost and time implications of the tooling process are particularly problematic for low-volume products aimed at niche markets, or alternatively for rapidly changing high-volume products. Rapid Prototyping (RP) and Rapid Tooling (RT) have the potential to dramatically shorten the time required to produce functional prototypes or products. Functional Analysis (FA) plays a key role in the design process of the actual tools, allowing for innovative solutions that can be achieved with RP and RT. This paper presents a FA methodology to design for manufacture (DFM) based on RP- and RT-specific characteristics, aimed at improving process efficiency, streamline energy consumption, use of volume material, usage of structural innovative lightweight materials, decrease overall costs and improve product quality. Design for Rapid Manufacturing (DFRM) allows for geometric freedom, leading to changes of the overall design process, thus enhancing the FA process. FA begins with stating the need, in a DFRM case that translates into diagnosis, the determination of the manufacturability of the present product and comparison with similar products on the market. Setting objectives, in terms of production costs, quality, flexibility, risk, lead-time, efficiency, and environment are other milestones in FA. Actual function definition involves defining the main functions of the product and their interactions. Clarifying the evaluation parameters, setting criteria levels and technical dimensioning is done for each of the main product functions. The conceptual design process then follows a top-down sequence: corporate, family, structural and component levels. Evaluation and selection of the optimal concept resulting from the FA consists of assessing the manufacturability of the proposed concepts in terms of the DFM objectives. The selected best fit concept is translated to design in the last stage, when the chosen concept is communicated to the development team. The detailed design is carried out in parallel to marketing and product development. Targeted FA is shown to enable generation of innovative solutions, while improving manufacturability. The present research stands as a starting point in the development of product design methodologies that use RP and RT applications for manufacturing physical products.
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Katz, Reuven, and Yoram Koren. "Reconfigurable Machines." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59056.
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Reconfigurable Machines form a new class of machines that are designed around a specific part family of products and allow rapid change in their structure. They are designed to allow changes in production requirements by changes in the machine mechanical configuration and structure. Reconfigurable machines might be designed for various types of production operations such as machining, inspection and assembly. This paper introduces characteristics and design principles of reconfigurable machines, and describes their features using an example of our new full-scale industrial prototype of a Reconfigurable Bore Surface Inspection Machine (RBSIM). In addition, the paper also describes briefly other three prototypes of Reconfigurable Machines that were developed during recent years in our center: (1) the Reconfigurable Machine Tool (RMT), (2) the Reconfigurable Inspection Machine (RIM), and (3) the Reconfigurable Assembly Machine (RAM).
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Monzo´n, Mario, Pedro M. Herna´ndez, Antonio N. Beni´tez, Mari´a D. Marrero, Mari´a A. A´lvarez, and Mark Kearns. "An Innovative Electroforming Process for Oil Heated Rotational Moulding Tools." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59114.
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Rotational moulding is a method to produce hollow plastic articles. Heating is normally carried out by placing the mould into a hot air oven where the plastic material in the mould is heated. The most common cooling media are water and forced air. Due to the inefficient nature of conventional hot air ovens most of the energy supplied by the oven does not go to heat the plastic and as a consequence the procedure has very long cycle times. Direct oil heating is an effective alternative in order to achieve better energy efficiency and cycle times. This research work has combined this technology with new innovative design of mould, applying the advantages of electroforming and rapid prototyping. Complex cavity geometries are manufactured by electroforming from a rapid prototyping mandrel. The approach involves conformal heating and cooling channels, where the oil flows into a parallel channel to the electroformed cavity (nickel or copper). Because of this the mould enables high temperature uniformity with direct heating and cooling of the electroformed shell. Uniform heating and cooling is important not only for good quality parts but also for good uniform wall thickness distribution in the rotationally moulded part. The experimental work with the manufactured prototype mould has enabled analysis of the thermal uniformity in the cavity, under different temperatures.
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Shetty, Devdas, Tom Eppes, Lifeng Chao, and Claudio Campana. "Integration of Modern Software Tools for Production Design." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-16099.
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Engineers, irrespective of their disciplines, need effective tools to comprehensively design, model, synthesize and analyze the design a product. This is often closely followed by the need to fabricate a working prototype. Engineers need useful methodologies and tools that can be used in preparation for manufacturing. These tools need to effectively analyze assembly & disassembly since a good assembly design makes a product les expensive to service, repair and maintain. A suite of well-integrated tools assists designers to create, simulate and test in a comprehensive manner. Modern software tools can be used at each stage to create conceptual designs, simulate part geometries, analyze key parameters, and generate motion paths for efficient manufacturing. This paper presents a set of comprehensive procedures and tools that can easily be incorporated into product design and manufacturing from early design through analysis. They consider assembly and disassembly factors up to and including the creation of a working prototype. Due to environmental regulations, designers must think about the product life cycle, recycling and reuse aspects from the very beginning. There is a continuing need for more efficient and rapid design processes which can best be driven by better tools and techniques.
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Ren, Huilong, Xiaobo Liu, Luodong Li, Guoqing Feng, and Chenfeng Li. "Virtual Prototype Based Virtual Test Technique for Fatigue Life of Ship Structure." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79846.
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Virtual test (VT) technique is a new kind of test technique which takes computer simulation analysis as its core. It develops rapidly in aviation, automobile manufacturing as well as in electronic system, but it is at an initial stage in ship field. In this paper, the virtual prototype (VP) based virtual test technique for fatigue life of ship structure was studied, and a virtual test system for fatigue life of ship structure was developed.
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Xiang, Jianping, Nicole Varble, Adnan Siddiqui, Luca Antiga, and Hui Meng. "AView: A Clinical Tool for Hemodynamic and Morphological Analysis of Intracranial Aneurysms." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14770.
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Neurointerventionists are routinely faced with the dilemma whether or not to treat unruptured intracranial aneurysms. Hemodynamic and morphological characteristics have become important considerations for aneurysm rupture-risk assessment [1]. Clinicians require an integrated tool that analyzes these parameters to help make treatment decisions in clinical workflow, however such a tool does not exist. To this end, Toshiba Stroke and Vascular Research Center (TSVRC) at University at Buffalo and Orobix Srl (Italy) have developed a prototype of a computational workflow system. Termed AView, it is an integrated, image-based vascular analysis tool for rapid assessment of aneurysmal hemodynamics, morphometrics, rupture risk assessment, and treatment planning.
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Wang, Wenzhu, Dong Du, Rendong Wu, Chaolong Yuan, and Baohua Chang. "Co-Simulation Research of the Balancing Control of the Moving Beam of a Heavy Hydraulic Press During the Die Forging Process." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-2856.
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A virtual prototype of the moving beam balancing system of a heavy-duty hydraulic press working under die forging function is built with Adams, AMESim and Simulink, and the balancing control process is analyzed using this prototype. The moving beam of the heavy-duty hydraulic press may tilt due to the eccentric load during the die forging processing, and thus affect the forging quality and the safety of the press. So it is necessary to research the beam balancing control process. Compared to the traditional methods based on simplified mathematical models, virtual prototype technology can obtain a co-simulation model, avoid tedious formula derivation and solving work, and save test time and cost. Based on the analysis of the working principle of balancing system, this paper establishes a dynamical model of the moving beam, a hydraulic circuit model of the single balancing system and a controller model using Adams, AMESim and Simulink, respectively. Then a virtual prototype is built using the three models via co-simulation interface files. The eccentric load signal is constructed in AMESim according to the variation of eccentric load during die forging process. By adjusting the controller parameters, the rapid balancing of the moving beam under eccentric load conditions is realized, and high precision of dynamic balancing and steady equilibrium is obtained. The simulation results show that the single balancing unit can achieve effective balancing of the moving beam, and the co-simulation analysis method based on the virtual prototype built with Adams, AMESim and Simulink is feasible in the research of the synchronous rectification of the moving beam. This work is a useful exploration in the research of synchronous rectification of moving beams.
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Pil, Anton, and Haruhiko Asada. "A Rapid Recursive Experimental Approach to Structure/Control Re-Design." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0042.
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Abstract This paper introduces an experimental recursive method for simultaneously changing both the mechanical structure and control design of mechatronic systems in order to improve the system’s overall performance. The method improves a system’s closed-loop control specifications through recursive concurrent structure reinforcement and control gain optimization. By using a process of structural reinforcement, a single prototype structure can be used repeatedly until the system performance goals are achieved. To determine the optimal incremental structure changes, a recursive algorithm based on a gradient descent method and a parameter estimation theory is employed. After the incremental structure reinforcements are applied, the control parameters are optimized with respect to multiple control specifications. Next, the resulting system incorporating the structure and control changes is tested and compared with the desired level of performance. The entire process consisting of experimental evaluation, data analysis, and structure reinforcement is repeated until the system performance achieves the desired level. Simulation experiments are successful in changing both the structural and control parameters of a simplified positioning system and show improvement in the system’s overall settling time.
Reports on the topic "Prototypage rapide – Analyse"
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Unwin, Stephen D., and Timothy E. Seiple. Risk D&D Rapid Prototype: Scenario Documentation and Analysis Tool. Office of Scientific and Technical Information (OSTI), 2009. http://dx.doi.org/10.2172/972562.
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Le, CHarles T., Gregory C. Gray, and Saibol K. Poddar. A Modified Rapid Method of Nucleic Acid Isolation From Suspension of Matured Virus: Applied in Restriction Analysis of DNA from an Adenovirus Prototype Strain and a Patient Isolate. Defense Technical Information Center, 2001. http://dx.doi.org/10.21236/ada420675.
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