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Rozprawy doktorskie na temat „Filament fabrication”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Stein, S. C. "Modelling of the filament-winding fabrication process." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/41585.

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A stress model of the filament-winding fabrication process, previously implemented in a finite element program, was improved. Pre- and post-processing codes were developed to make the program easier and more efficient to use. A program which is used to design filament wound composite rocket motor cases was modified to write a model file for the fabrication stress code in the pre-processing stage. The same code was altered to provide post-processing output in the form of graphic displays. Also, a new code was written to provide additional post-processing capability for the fabrication stress mo

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Alves, Fábio Alcino Carvalho. "Análise e otimização do processo Fused Filament Fabrication." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14298.

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Mestrado em Engenharia Mecânica<br>No processo de impressão 3D por FFF, o equipamento deve manter as caraterísticas de funcionamento normais dentro de determinados parâmetros durante todas as fases do processo. Contudo, o excesso de temperatura em determinados componentes pode levar à interrupção do processo de impressão. Desta forma, torna-se imperativo analisar o processo e postular soluções que permitam re-conceber o sistema de modo a enfrentar esses desafios operacionais. O processo foi instrumentado e analisado, tendo-se ainda procedido ao desenvolvimento de um modelo que, por recurso à a

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Nguyen, Vinh Dinh. "A fabrication stress model for axisymmetric filament wound composite structures." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/77829.

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A comprehensive fabrication stress model was developed to compute fiber stresses in axisymmetric filament wound composite structures at any stage of the fabrication process, a prerequisite for the evaluation of the performance of the composite structures from fabrication process variables. The stress model uses an isoparametric axisymmetric finite element formulation and a double-layered composite element to model the mechanical behavior of the composite material in any cure state. An incremental finite element formulation was used to model the winding and mandrel removal stages. A thermo-mech

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4

ANDERSSON, AXEL. "Automation of Fused Filament Fabrication : Realizing Small Batch Rapid Production." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299447.

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In this bachelor thesis, I examine how automation of fused filament fabrication (FFF) can be implemented, and what the limitations are for different kinds of automation solutions for FFF. Fused filament fabrication is a 3D-printing technology where a material is extruded through a nozzle, layer by layer, to create a print. The thesis also provides a calculation for the commercial feasibility of small batch rapid production with the implementation of an automation solution for FFF. The approach was a qualitative study containing five interviews, combined with empirical knowledge and data from t

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Hayagrivan, Vishal. "Additive manufacturing : Optimization of process parameters for fused filament fabrication." Thesis, KTH, Lättkonstruktioner, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-238184.

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An obstacle to the wide spread use of additive manufacturing (AM) is the difficulty in estimating the effects of process parameters on the mechanical properties of the manufactured part. The complex relationship between the geometry, parameters and mechanical properties makes it impractical to derive an analytical relationship and calls for the use of a numerical model. An approach to formulate a numerical model in developed in this thesis. The AM technique focused in this thesis is fused filament fabrication (FFF). A numerical model is developed by recreating FFF build process in a simulation

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Daguilh, Thad. "A joule heating mechanism for high-speed fused filament fabrication." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/123262.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 31).<br>Extrusion-based additive manufacturing, known as fused filament fabrication (FFF), is one the most accessible methods of rapid prototyping, capable of handling a wide variety of engineering thermoplastics. Productivity limitations hinder the further application of FFF to both prototyping and production. An FFF system consists of three synchronized processes: heat conduction into the feedstock, gantry speed,

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Ansari, Mubashir Qamar. "Generation of Thermotropic Liquid Crystalline Polymer (TLCP)-Thermoplastic Composite Filaments and Their Processing in Fused Filament Fabrication (FFF)." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/99885.

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One of the major limitations in Fused Filament Fabrication (FFF), a form of additive manufacturing, is the lack of composites with superior mechanical properties. Traditionally, carbon and glass fibers are widely used to improve the physical properties of polymeric matrices. However, the blending methods lead to fiber breakage, preventing generation of long fiber reinforced filaments essential for printing load-bearing components. Our approach to improve tensile properties of the printed parts was to use in-situ composites to avoid fiber breakage during filament generation. In the filaments ge

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Gkaliamoutsas, Pantelis. "Modeling fused filament fabrication machine height accuracy through layer thickness variation." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113766.

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Thesis: M. Eng. in Advanced Manufacturing and Design, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 85-88).<br>This thesis addresses the modeling and prediction of total height error of a 3D printed part using a layer-by-layer approach. Layer to layer thickness error is modeled across the build height of Polyactic acid (PLA) and Acrylonitrile butadiene styrene (ABS) parts. A height error compensation model is then formulated and applied at a G-code level to drive the mach

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Lee, Shien Yang. "Height error mapping and compensation for a fused filament fabrication machine." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113920.

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Thesis: M. Eng. in Advanced Manufacturing and Design, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 95-98).<br>An artifact-based height error mapping and compensation method for fused lament fabrication machines ("3D printers") is developed. In the proposed method, an error mapping artifact is produced and

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10

Peng, Fang. "CORE-SHELL STRUCTURED FILAMENTS FOR FUSED FILAMENT FABRICATION THREE-DIMENSIONAL PRINTING & ROLL-TO-ROLL MANUFACTURING OF PIEZORESISTIVE ELASTOMERIC FILMS." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1542976477808743.

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Huang, Yerong. "Exploring Anisotropy and Residual Stress in Fused Filament Fabrication for 4D Printing." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29485.

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Fused Filament Fabrication (FFF) is an extrusion-based additive manufacturing technique that can build 3D objects in successive layers, offering viable and affordable 3D printing solutions that produce minimum waste. There are two barriers that prevent the advanced application of FFF: The performance and geometric precisions of FFF printed products are prone to the anisotropy and residual stresses arising from the printing process, and objects with complex geometries must be printed with the aid of support structures. The thesis addresses these challenges by exploring the anisotropy and residu

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Hebda, Michael J. "Creation of controlled polymer extrusion prediction methods in fused filament fabrication. An empirical model is presented for the prediction of geometric characteristics of polymer fused filament fabrication manufactured components." Thesis, University of Bradford, 2019. http://hdl.handle.net/10454/18399.

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This thesis presents a model for the procedures of manufacturing Fused Filament Fabrication (FFF) components by calculating required process parameters using empirical equations. Such an empirical model has been required within the FFF field of research for a considerable amount of time and will allow for an expansion in understanding of the fundamental mathematics of FFF. Data acquired through experimentation has allowed for a data set of geometric characteristics to be built up and used to validate the model presented. The research presented draws on previous literature in the fields of

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Johansson, Frans. "Optimizing Fused Filament Fabrication 3D printing for durability : Tensile properties and layer bonding." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-12355.

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With the rapid increase in utilization of the cheap and user friendly Fused Filament Fabrication, FFF 3D printer, a deeper knowledge about the technique is needful. The frame restricting the 3D printers for prototyping purposes is fading and a new phase of endless application possibilities is emerging. To bridge the gap in possible applications from prototypes to real products it is key to know and improve the factors affecting durability. With over a hundred settings and parameters to tweak the FFF 3D printing process there are a lot of opportunities, opportunities to optimize for durability.

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14

Braconnier, Daniel J. "Materials Informatics Approach to Material Extrusion Additive Manufacturing." Digital WPI, 2018. https://digitalcommons.wpi.edu/etd-theses/204.

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Process-structure-property relationships in material extrusion additive manufacturing (MEAM) are complex, non-linear, and poorly understood. Without proper characterization of the effects of each processing parameter, products produced through fused filament fabrication (FFF) and other MEAM processes may not successfully reach the material properties required of the usage environment. The two aims of this thesis were to first use an informatics approach to design a workflow that would ensure the collection of high pedigree data from each stage of the printing process; second, to apply the work

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15

Vijayakumar, Dineshwaran. "Manufacturing Carbon Nanotube Yarn Reinforced Composite Parts by 3D Printing." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1481031494735314.

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Ginoux, Geoffrey. "Impression 3D et nanocomposites : Étude du comportement de mélanges PLA/argile appliquée à la fabrication additive par extrusion de matériaux." Thesis, Reims, 2018. http://www.theses.fr/2018REIMS016/document.

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La fabrication additive est un procédé d’élaboration permettant la mise en forme d’une pièce par ajout de matière, par empilement de couches successives. Bien que de plus en plus de polymères puissent être mis en œuvre par cette technologie, les polymères chargés en sont quasiment absents, alors qu’ils sont largement utilisés dans les autres types de procédés de mise en forme. Les objectifs scientifiques et technologiques du projet concernent (i) une meilleure compréhension des relations entre le comportement rhéologique de systèmes polymères et leur aptitude à la mise en forme par les technol

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17

Vecchi, Gabriele. "Progettazione, fabbricazione e verifiche sperimentali di una vite plastificatrice per produzione additiva." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Fra le tecnologie additive, la Fused Filament Fabrication è fra le più diffuse per quanto riguarda l'utilizzo di materiali polimerici. Tuttavia, il semilavorato di partenza, ovvero un filamento, impone numerosi vincoli per quanto riguarda la scelta del materiale e costi di acquisto elevati. Un tentativo di superare questo limite è l'utilizzo della Fused Granulate Fabrication, ovvero una tecnologia di stampa che utilizza come materiale di partenza il materiale polimerico allo stato granulare, il che rende possibile l'utilizzo di molteplici materiali anche di riciclo, oltre ad abbassare notev

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18

Mai, John. "Aesthetic, Surface Form and Mechanical Performance of 3D Printed Wood-Plastic Composites." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/24856.

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Fused filament fabrication (FFF) is an additive manufacturing technology that has been developed into a flexible method of creating a large variety of objects from a digital model. While desktop 3D FFF printers are commonly used to create small-scale, horizontally layered objects that have a homogenous appearance, large-scale complex formations with an aesthetic appearance are far more challenging to produce. This has limited the applications of products made by FFF to mainly architectural models and small-scale structural components. The aim of this work is to expand the technology to manufac

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Coe, Edward Olin. "Printing on Objects: Curved Layer Fused Filament Fabrication on Scanned Surfaces with a Parallel Deposition Machine." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/101096.

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Consumer additive manufacturing (3D printing) has rapidly grown over the last decade. While the technology for the most common type, Fused Filament Fabrication (FFF), has systematically improved and sales have increased, fundamentally, the capabilities of the machines have remained the same. FFF printers are still limited to depositing layers onto a flat build plate. This makes it difficult to combine consumer AM with other objects. While consumer AM promises to allow us to customize our world, the reality has fallen short. The ability to directly modify existing objects presents numerous pos

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20

Nienhaus, Vinzenz [Verfasser], Edgar [Akademischer Betreuer] Dörsam, and Matthias [Akademischer Betreuer] Oechsner. "Untersuchung und Modellierung von Kunststoffextrusionssystemen in der Fused Filament Fabrication / Vinzenz Nienhaus ; Edgar Dörsam, Matthias Oechsner." Darmstadt : Universitäts- und Landesbibliothek, 2021. http://d-nb.info/1231435968/34.

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Bakrani, Balani Shahriar. "Additive manufacturing of the high-performance thermoplastic : experimental study and numerical simulation of the Fused Filament Fabrication." Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0055.

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La fabrication additive (FA) fait référence à une grande variété de procédés de fabrication pour le prototypage rapide et la production de produits finis et semi-finis. Contrairement aux procédés classiques ou soustractifs, en fabrication additive, le matériau est ajouté progressivement couche par couche pour former les pièces. La fabrication additive permet la fabrication de pièces complexes impossibles ou peu rentables à fabriquer avec les procédés traditionnels. Le procédé FFF (Fused Filament Fabrication) est basé sur la fusion d'un filament polymère ; le filament est ensuite déposé couche

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Tricard, Thibault. "Procedural noises for the design of small-scale structures in Additive Manufacturing." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0065.

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La démocratisation de la fabrication additive a suscité un regain d'intérêt pour ses applications potentielles. Parmi celles-ci, la possibilité d'imprimer des structures à petite échelle est particulièrement prometteuse. La géométrie des structures internes à petite échelle influence directement les propriétés physiques des pièces finales. Ainsi, la découverte de nouvelles structures à petite échelle produisant des propriétés cibles spécifiques élargit les possibilités offertes aux utilisateurs de la fabrication additive, ce qui ouvre la voie à de nouvelles applications potentielles en soft-ro

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Zandi, Mohammad Damous. "Study and characterization of mechanical properties of wood-PLA composite (Timberfill) material parts built through fused filament fabrication." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/669587.

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This research is based upon the additive manufacturing (AM) technology which aims to study the mechanical properties of innovative commercial wood-PLA composite material (Timberfill) and characterize its behavior. Specifically fatigue, tensile, and flexural tests are performed and the results are evaluated to conclude this issue. To manufacture the experimental samples one of the most common techniques named fused filament fabrication (FFF) is applied, consequently the influence of manufacturing parameters on the mechanical properties have been considered. For this reason some of the most infl

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Seguine, Tyler William. "4D-Printing with Cellulose Nanocrystal Thermoplastic Nanocomposites: Mechanical Adaptivity and Thermal Influence." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103467.

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This thesis is concerned with fused filament fabrication (FFF) of cellulose nanocrystal (CNC) and thermoplastic polyurethane (TPU) nanocomposites, focusing on preliminary optimization of a processing window for 3D printing of mechanically responsive composites and the influence of temperature on mechanical adaptivity, thermal stability, and rheology. CNC thermoplastic nanocomposites are a water responsive, mechanically adaptive material that has been gaining interest in additive manufacturing for 4D-printing applications. Using a desktop FlashForge Pro 3D printer, we first established a viable

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GEBREYES, WONDIMU ALEMU. "AN ELECTROCHEMICAL MICROFLUIDIC BIOSENSOR PLATFORM FABRICATED BY ADDITIVE MANUFACTURING AND SUPERSONIC CLUSTER BEAM DEPOSITION." Doctoral thesis, Università degli Studi di Milano, 2019. http://hdl.handle.net/2434/613065.

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Fused Filament Fabrication (FFF) three-dimensional printing have attracted much attention for fabrication of microfluidic platforms used to construct electrochemical microfluidic biosensors because of high process speed, low production costs and the possibility of manufacturing directly from virtual data. Because of poor adhesion between metal electrodes fabricated using conventional techniques and FFF printed thermoplastic substrates, electrodes are usually integrated into the devices either modularly or using adhesive layers placed at the bottom of fluidic channels. These have hindered the e

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Le, Boterff Julien. "Compréhension des phénomènes physico-chimiques impliqués dans la réalisation de pièces polyoléfines par fabrication additive." Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Lille Douai, 2019. http://www.theses.fr/2019MTLD0012.

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Les procédés de fabrication additive (FA) permettent de répondre, aujourd’hui, à des problématiques industrielles majeures. Ces technologies offrent la possibilité de réaliser, pour un temps et un coup raisonnables, des pièces avec des géométriques complexes difficiles, voire impossibles, à réaliser avec des procédés traditionnaux. Parmi les différents procédés de FA, le procédé APF (Arburg Plastic Freeforming) permet la fabrication de pièces 3D à partir de granulés de polymères identiques à ceux employés en injection. Ces granulés peu onéreux constituent une matière première de choix puisque,

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Yang, Yunchong. "4D PRINTING OF A HIGHLY EXTENSIBLE SHAPE MEMORY ELASTOMER WITH AN INTERFACIAL-ADHESION EFFECT BASED ON FUSED FILAMENT FABRICATION." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron159067358988639.

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Rabionet, Diaz Marc. "Design and fabrication of three-dimensional scaffolds for breast cancer stem cell expansion and molecular characterization." Doctoral thesis, Universitat de Girona, 2021. http://hdl.handle.net/10803/674042.

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Triple negative breast cancer (TNBC) accounts for 15-20% of the breast cancers and displays an aggressive profile, poor prognosis, high relapse risk and does not have a targeted therapy. In the last years, breast cancer stem cells (BCSCs) have emerged as a possible novel therapeutic target for this breast cancer subtype. BCSCs are a small population within the tumor with relative resistance to current treatments and tumorigenic capacity, favouring relapse. Unfortunately, their study is difficult due to the fac that tradition in vitro two-dimensional (2D) cell culture induces their differentiat

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Kulkarni, Apoorv Sandeep. "Ceramic Si-C-N-O cellular structures by integrating Fused Filament Fabrication 3-D printing with Polymer Derived Ceramics." Doctoral thesis, Università degli studi di Trento, 2022. http://hdl.handle.net/11572/349905.

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Ceramic additive manufacturing is gaining popularity with methods like selective laser sintering (SLS), binder jetting, direct ink writing and stereolithography, despite their disadvantages. Laser sintering and binder jetting are too expensive, while direct ink writing lacks resolution and stereolithography lacks scalability. The project aims to combine one of the most versatile, affordable, and readily available 3D printing methods: fused filament fabrication (FFF) with polymer derived ceramics to produce cellular ceramics to overcome the disadvantages posed by the other methods. The process

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Call, Russell Kent. "Parameter establishment and verification of a fabrication stress model and a thermo-kinetic cure model for filament wound structures." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08142009-040256/.

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Parent, Alex, and Alex Parent. "Développement d'un système de fabrication additive hybride par mise en fusion d'un filament d'aluminium grâce au chauffage par induction." Master's thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/37159.

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Les machines de fabrication additive métallique actuelles sont dispendieuses et généralement peu productives. De plus, la plupart des pièces issues de la fabrication additive doivent être usinées après l’impression pour obtenir de bonnes tolérances géométriques. L’objectif de ce projet de recherche est de développer un système de fabrication additive hybride pouvant remplacer les machines d’usinage traditionnelles. Les systèmes hybrides combinent les avantages de la fabrication additive et de l’usinage dans un seul système. Ce mémoire présente le développement et la mise en service d’un systèm

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Lacorne, Jordan. "Fabrication additive par fil fondu d’un acier martensitique : Formulation du fil et étude du déliantage/frittage." Electronic Thesis or Diss., Lyon, INSA, 2024. http://www.theses.fr/2024ISAL0112.

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Le procédé FFF (Fused Filament Fabrication) est une technique de fabrication additive pour créer des pièces métalliques à moindre coût. Il comprend plusieurs étapes : l’élaboration et la fabrication des filaments composé d’une matrice polymère et de poudre métallique, l’impression des pièces dites vertes, le déliantage consiste à retirer la matrice polymère soit par dissolution par solvant, soit par dégradation thermique, le frittage densifie les pièces laissées poreuses après le déliantage. L’entreprise Nanoe, spécialisée dans les filaments céramiques, cherche à étendre son expertise aux pièc

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Griffin, Karl W. "Fabrication and characterisation of a hoop-reinforced, continuous silicon carbide fibre, titanium matrix composite produced by filament winding and hot isostatic pressing." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0014/MQ32398.pdf.

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El, moussaid Mohammed. "Analyse et intégration des spécificités liées au procédé de fabrication dans les modèles de calcul des structures composites : application à la simulation du comportement mécanique des fonds des réservoirs bobinés." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0059/document.

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Les réservoirs en matériaux composites représentent un moyen pourle stockage de l’hydrogène à des pressions de service très élevées. En dépit desnombreux avantages que présentent les réservoirs en composites, le stockage soushaute pression conduit à utiliser de fortes épaisseurs de composites, et lecomportement de ce type de structure reste mal maitrisé. Le procédé d’enroulementfilamentaire induit des variabilités et défauts qui impactent le comportement de lastructure et en particulier le comportement des fonds. De ce fait, il est nécessaired'apprécier ces variabilités dans la modélisation du

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Guillet, Joëlle. "Dépôt de couches minces de silicium polycristallin par décomposition du silane sur un filament chaud pour la réalisation de cellules photovoltaïques." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0134.

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Cette these a pour objectif d'etudier une nouvelle technique de depot de silicium, afin de realiser des cellules photovoltaiques bon marche. La technique choisie fut celle du filament chaud (cvd) afin de deposer du silicium polycristallin. Cette etude comprend une premiere partie presentant les couches deposees, et la deuxieme partie tente d'expliquer les resultats obtenus. Dans un premier temps le reacteur filament chaud (en tungstene), dans lequel est injecte un melange de silane et d'hydrogene, est presente ainsi que les modifications qui ont permis d'augmenter la duree de vie du filament,

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Benarbia, Adel. "Etude expérimentale et modélisation phénoménologique de l'impression FFF de polymères PAEK chargés et natures." Electronic Thesis or Diss., Nantes Université, 2024. http://www.theses.fr/2024NANU4040.

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Le procédé de fabrication additive par FFF (Fused Filament Fabrication) implique l'extrusion d'un polymère fondu selon des trajectoires complexes déterminées. Cependant, ce procédé présente des limitations, notamment une diminution des propriétés mécaniques comparée aux techniques de fabrication conventionnelles. Cette baisse des performances est principalement due à une adhésion insuffisante aux interfaces des filaments et à la présence de macroporosités. Ces phénomènes sont fortement influencés par l’historique thermique, mais aussi à la présence de cristaux dans le cas des polymères semicri

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Residori, Sara. "FABRICATION AND CHARACTERIZATION OF 3D PRINTED METALLIC OR NON-METALLIC GRAPHENE COMPOSITES." Doctoral thesis, Università degli studi di Trento, 2022. https://hdl.handle.net/11572/355324.

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Nature develops several materials with remarkable functional properties composed of comparatively simple base substances. Biological materials are often composites, which optime the conformation to their function. On the other hand, synthetic materials are designed a priori, structuring them according to the performance to be achieved. 3D printing manufacturing is the most direct method for specific component production and earmarks the sample with material and geometry designed ad-hoc for a defined purpose, starting from a biomimetic approach to functional structures. The technique has the a

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He, Qinghao. "Structure-property Relationship of 3D Printed Polymers and Fibre-reinforced Composites." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/24365.

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Fused filament fabrication (FFF) has been utilised in various applications as it provides a cost-effective and flexible method to fabricate products in low volume. In carrying out both microstructural and mechanical characterisations, this study systematically elaborates the process-structure-property relationships of 3D printed thermoplastics, short fibre reinforced polymers and continuous fibre-reinforced polymer composites fabricated by the FFF process. The work is of great importance as it yields in-depth insight into the mechanisms of the novel manufacturing process, providing valuable gu

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TORRE, ROBERTO. "Theoretical, numerical, and experimental methodologies for structural analysis of polymeric aeronautical elements produced via additive manufacturing." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2915193.

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Costa, Alfredo Nuno Mota Ribeiro da. "Nanocompósitos de matriz polimérica para impressão 3D." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/16859.

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Mestrado em Engenharia Mecânica<br>O fabrico aditivo apresenta enorme potencial, uma vez que permite produzir objetos de geometrias complexas muitas vezes sem recorrer a ferramentas auxiliares, sendo ainda capaz de usar uma vasta gama de materiais. Um exemplo de uma das tecnologias aditivas é o fabrico por filamento fundido (FFF), frequentemente associado ao termo "impressão 3D". Um dos materiais termoplásticos mais utilizado é o ácido poliláctico (PLA), um material biocompatível e biodegradável, cuja produção industrial é menos poluente do que a maioria dos termoplásticos presentes no

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Abdelki, Andreas. "Fused deposition modeling of API-loaded mesoporous magnesium carbonate." Thesis, Uppsala universitet, Nanoteknologi och funktionella material, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-417897.

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In this thesis, the incorporation of drug loaded mesoporous magnesium carbonate as an excipient for the additive manufacturing of oral tablets by fused deposition modeling was investigated. Cinnarizine, a BCS class II drug, was loaded into the pores of the mesoporous material via a soaking method, corresponding to a drug loading of 8.68 wt%. DSC measurements on the loaded material suggested that the drug was partially crystallized after incorporation, meanwhile the XRD diffractogram implied that the drug was in a state lacking long range order. The drug loaded material was combined with two ph

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Carter, Justin B. "Vibration and Aeroelastic Prediction of Multi-Material Structures based on 3D-Printed Viscoelastic Polymers." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1627048967306654.

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Onyeako, Isidore. "Resolution-aware Slicing of CAD Data for 3D Printing." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34303.

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3D printing applications have achieved increased success as an additive manufacturing (AM) process. Micro-structure of mechanical/biological materials present design challenges owing to the resolution of 3D printers and material properties/composition. Biological materials are complex in structure and composition. Efforts have been made by 3D printer manufacturers to provide materials with varying physical, mechanical and chemical properties, to handle simple to complex applications. As 3D printing is finding more medical applications, we expect future uses in areas such as hip replacement - w

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Sneary, Adrian Bernard. "The fabrication of a high temperature superconducting magnet and critical current characterisation of the component Bi₂Sr₂Ca₂Cu₃Oₓ tapes and filaments in high magnetic fields". Thesis, Durham University, 2000. http://etheses.dur.ac.uk/4517/.

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The transport critical current density (J(_c)) of a 37 filament Bi-2223/Ag tape has been measured as a function of field and temperature from 4.2 K up to 90 K. Data have been obtained over a large current range from 10 mA up to 100 A and in fields up to 23 T with the tape in 3 orientations with respect to field. These comprehensive data have been used to test the predictions of the flux creep and weak link models used to explain J(_c) in Bi-2223 tapes. The J(_c)(B,T) dependence of optimised Bi-2223 tapes has been calculated using a curved film model. The model assumes perfect grain connectivit

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Roumy, Laurane. "Study of the Electro-Thermo-Mechanical Behaviour of a 4D Printed Actuator." Electronic Thesis or Diss., Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2024. http://www.theses.fr/2024ESMA0016.

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L’objectif de ce travail de thèse était de développer une charnière électrosensible en se basant sur l’impression 4D. Il s’agit d’utiliser une méthode de fabrication additive couplée à un matériau intelligent sensible à un stimulus externe dans le but de créer un mouvement, la quatrième dimension étant le temps. Pour cette étude, le stimulus externe est la température, et l’échauffement est obtenu par effet Joule. L’impression par Fused Filament Fabrication (FFF) qui permet la création d’une structure tridimensionnelle par le dépôt de filaments de polymère fondu a été choisie pour son coût peu

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Fenollosa, Artés Felip. "Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/667421.

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La present tesi doctoral s’ha centrat en el repte d’aconseguir, mitjançant Fabricació Additiva (FA), models per a assaig quirúrgic, sota la premissa que els equips per fer-los haurien de ser accessibles a l’àmbit hospitalari. L’objectiu és facilitar l’extensió de l’ús dels prototips com a eina de preparació d’operacions quirúrgiques, transformant la pràctica mèdica actual de la mateixa manera que en el seu moment ho van fer tecnologies com les que van facilitar l’ús de radiografies. El motiu d’utilitzar FA, en lloc de tecnologies més tradicionals, és la seva capacitat de materialitzar de forma

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Nienhaus, Vinzenz. "Untersuchung und Modellierung von Kunststoffextrusionssystemen in der Fused Filament Fabrication." Phd thesis, 2021. https://tuprints.ulb.tu-darmstadt.de/17756/1/2020_Diss_VN_Untersuchung_Modellierung_Kunststoffextrusionssysteme_FFF.pdf.

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Die Fused Filament Fabrication (FFF, Markenname FDM) ist ein allgegenwärtiges additives Fertigungsverfahren, befindet sich jedoch industriell im Stadium der Erprobung und es fehlen wissenschaftliche Erkenntnisse über den Prozess. Dies hat besondere Bedeutung für den wachsenden Markt 3D-gedruckter Medizinprodukte, zum Beispiel Implantate aus PEEK oder resorbierbare Mikrostrukturen zur Osseointegration und zum Tissue Engineering. Die vorliegende Arbeit untersucht grundlegende Zusammenhänge von Filamentantrieb und Aufschmelzsystem durch Variation der signifikanten Einflussparameter unter Einbezie

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Chen, Wei Hung, and 陳韋宏. "Study on the Fabrication of Composite Materials Prepared through Filament Winding." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/19300054013540377243.

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"Fused Filament Fabrication of Prosthetic Components for Trans-Humeral Upper Limb Prosthetics." Doctoral diss., 2017. http://hdl.handle.net/2286/R.I.45939.

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abstract: Presented below is the design and fabrication of prosthetic components consisting of an attachment, tactile sensing, and actuator systems with Fused Filament Fabrication (FFF) technique. The attachment system is a thermoplastic osseointegrated upper limb prosthesis for average adult trans-humeral amputation with mechanical properties greater than upper limb skeletal bone. The prosthetic designed has: a one-step surgical process, large cavities for bone tissue ingrowth, uses a material that has an elastic modulus less than skeletal bone, and can be fabricated on one system. FFF osse

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Hebda, Michael, C. McIlroy, Benjamin R. Whiteside, Philip D. Caton-Rose, and Philip D. Coates. "A method for predicting geometric characteristics of polymer deposition during fused-filament-fabrication." 2019. http://hdl.handle.net/10454/16895.

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Yes<br>In recent years 3D printing has gained popularity amongst industry professionals and hobbyists alike, with many new types of Fused Filament Fabrication (FFF) apparatus types becoming available on the market. A massively overlooked component of FFF is the requirement for a simple method to calculate the geometries of polymer depositions extruded during the FFF process. Manufacturers have so far achieved adequate methods to calculate tool-paths through so called slicer software packages which calculate the required velocities of extrusion from prior knowledge and data. Presented here is a

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