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Rozprawy doktorskie na temat „ABAQUS MODEL”

Autor: Grafiati

Data publikacji: 11 września 2023

Data aktualizacji: 31 lipca 2025

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1

Wang, Yaolun. "Vibrational measurement techniques applied on FE-model updating." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-45213.

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In this thesis, the dynamics of two plates overlapping and connected by three bolts are studied. The data collected in the test are used in modal analysis. The vibrational test and the modal analysis were made using an LMS system. Hammer excitation is used for the tests. The main purpose of this thesis is to study how the suspensions affect the extracted eigenfrequencies and modal dampings. In this thesis, more than 10 suspensions were examined. Another objective in this thesis work is to build an FE-model. This model is made using the software Abaqus. To improve the reliability of the FE-mode

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Yan, Kaidi. "The Abaqus/CAE Plug-in for Premium Threaded connection 3D parameter Finite Element Model." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78245.

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Finite Element Analysis (FEA) is proposed to simulate the connection response of practical in-service conditions and test the performance of Oil Country Tubular Goods (OCTG) premium threaded connections. A plug-in is developed in Abaqus/CAE for creating the 360-degree full 3D parametric finite element model with helical threads as an effective design and analysis tool. All size, position and material data of the model are parameterized. The premium connection plug-in accepts input from the Graphical User Interface (GUI) for further modification. Each premium connection component is programed a

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3

Piątek-Sierek, Ewa. "Kalibracja parametrów określających właściwości betonu opisanego modelem plastyczno-degradacyjnym zaimplementowanym w programie ABAQUS." Rozprawa doktorska, [Nakł.aut.], 2013. http://dlibra.utp.edu.pl/Content/574.

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W pracy opisano i zidentyfikowano parametry podlegające kalibracji. Kalibrację modelu zaimplementowanego w programie ABAQUS przeprowadzono w oparciu o rezultaty badań własnych laboratoryjnych betonu oraz zależności empiryczne. Opracowano tzw. algorytm kalibracji oraz zamieszczono gotowe pakiety kalibracyjne dla betonów o typowych wartościach wytrzymałości na ściskanie.

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Li, Yumeng. "Study of Forming of Composite Materials with Abaqus CAE and The Preferred Fiber Orientation (PFO) Model." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1511719634128258.

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Feng, Fan. "Flutter Analysis of Stonecutters Cable-stayed Bridge using Finite Element Model." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32470.

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The current research analyzed the flutter response of the Stonecutters Cable-Stayed Bridge in Hong Kong, which has a twin deck configuration, under the effect of wind. The aerodynamic instability response of the bridge steel deck of the main span is mainly the focus of the current project. Initially, a complete finite element bridge model was created in ABAQUS finite element software, representing all the structural elements of the Stonecutters Cable-Stayed Bridge in a lumped mass bridge model. The natural frequencies and the vibration modes were validated against the data available in the lit

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Funtusov, E. "The computing of the casing scale model with using of ABAQUS system and tensile load." Thesis, Sumy state university, 2014. http://essuir.sumdu.edu.ua/handle/123456789/39217.

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The casing is under axial tensile loads during the life of the well because of the gravity force at lowering the casing. The critical section of the casing is situated on the wellhead and the tensile load arises because more joints are added to the string.

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7

Lantoine, Rémi. "A 3D sliding bearing finite element based on the Bouc-Wen model : Implementation in Abaqus." Thesis, KTH, Bro- och stålbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280479.

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As rail transportation is significantly more virtuous than airplanes or cars in terms of greenhousegases emissions, its development is being encouraged in several European countries, includingSweden. In addition, the development of railway lines on which trains can travel at higher speeds ismade in Sweden with the integration of existing infrastructure. On railway bridges, an increased trainspeed potentially leads to an increase in vibrations during passage, for which the structure may not bedesigned. It is therefore essential to know the dynamic properties of the structures used.Several studi

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8

Kodavati, Venkata Seshank, and Devi Prasad Buraga. "Study of Numerical Model Parameters and Crack Tip of a Packaging Materials." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13840.

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Packaging industries widely use Low-Density Polyethylene (LDPE) in manufacturing different types of containers to store the food products. They are difficult to model numerically in order to have similar experimental response. This research deals with the study of numerical material model parameters of continuum LDPE. It is carried out with the help of experiments along with the numerical simulation of LDPE. Study of stress-strain distribution at crack tip and elements close to the tip is carried out in the LDPE material with the pre-existing center crack with varying lengths. By implementing

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Cravotta, Stefan, and Emanuele Grimolizzi. "Simulation of vehicle impact into a steel building : A parametric study on the impacted column end-connections." Thesis, KTH, Bro- och stålbyggnad, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172341.

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Understanding the true behaviour of impacted structures is the only way to assess their robustness under exceptional events such as vehicle collision. The primary objective of this master’s thesis was to perform a finite element parametric investigation on the influence that some parameters have in steel buildings subjected to vehicle impacts. The parameters chosen for the study, involved uncertainties in the material definition and in the load configuration of the bolts used in the impacted column end-connections. By using the Abaqus software, a finite element model of the structure has been

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10

Xu, Shengmin, and Peiwei Tan. "Glued timber connections : Experimental and numerical study of tension behavior under various influencing parameters." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-45371.

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Glued connections are relatively new in structural timber engineering. They are expected to show high connection stiffness as well as a high connection strength compared to mechanical connections e.g. dowel‐type connections.The main aim of this thesis is to characterize the behavior of glued timber connections under pure tension by conducting experiments as well as numerical simulations. Hereby the influence of different parameters is studied such as the geometry (bond-line length and thickness) and the material properties (e.g. adhesives of highly diverse stiffness). Additionally, reference t

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11

Gopallawa, Praveen. "Fatigue Failure Model for Local Roads in Ohio that Use Road User Maintenance Agreements Due to the Increase in Truck Traffic." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1566389151107255.

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12

Özdemir, Hulya, and Azad Abbas. "Analyzing an Equivalent Single Layer Shim Model to be used for Brake Squeal Reduction." Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-22386.

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The goal in this thesis was to reduce a multilayer shim model, which was modeled from steel and polymer (isotropic materials), into an equivalent single layer shim model. The procedure was to use mathematical formulations to convert a multilayer shim into an ESL (equivalent single layer) shim. Here, a transverse isotropic model is used to prepare for future orthotropic layers. The results show that the ESL model behaves isotropically. In the 2 layer model there was no squeal noise whereas in the ESL models there is.

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13

Nowacki, Brenna M. "Verification and Calibration of State-of-the-Art CMC Mechanistic Damage Model." University of Dayton / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1461761780.

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14

Das, Satyajit. "Mechanics of 3D composites." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/271189.

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This thesis contributes towards understanding of mechanical response of 3D composites and ceramics. Composite materials have widespread applications ranging from aerospace, civil sectors to sports and drones. One important application is in composite armours where composites and ceramic layers are used together. Therefore, it is important to study the mechanical response of these components to develop better armour systems. The first part of this thesis concerns with dynamic penetration response of confined ceramic targets. In the second part, mechanics of a novel 3D composite consisting of or

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15

Jin, Hui, and Hao Wu. "Finite Element Modelling of Fracture in dowel-type timber connections." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-34783.

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Dowel-type steel to timber connections are commonly used in timber structure. The load carrying capacity and the stress distribution within the connection area are complicated and the failure behavior of a connection depends on many parameters. The main purpose of this thesis was to verify, using the data obtained from previous experiments, the conventional design method of European Code 5(EC5) (hand calculation) for dowel type joints subjected to pure bending moment and other alternative design methods based on the finite element method (FEM) including the use of the mean stress approach and

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16

Crudo, Cinzia. "Investigation on laser shock peening capability by FE simulation." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5534/.

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Laser shock peening is a technique similar to shot peening that imparts compressive residual stresses in materials for improving fatigue resistance. The ability to use a high energy laser pulse to generate shock waves, inducing a compressive residual stress field in metallic materials, has applications in multiple fields such as turbo-machinery, airframe structures, and medical appliances. The transient nature of the LSP phenomenon and the high rate of the laser's dynamic make real time in-situ measurement of laser/material interaction very challenging. For this reason and for the high cost

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Al, Karkour Khaleel. "Unreinforced masonry walls and flange effect: a parametric study through block-based modeling." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.

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This study reported in this thesis shows the flange effect in unreinforced masonry walls subjected to in-plane loading. Previous studies showed the importance of capturing the in-plane behaviour of flanged masonry walls for seismic studies. A generative tool was developed using Dynamo and Abaqus Scripting Interface (ASI) to make a parametric model covering most cases of constructing the flange wall. The analysis was held using Finite Element Method through ABAQUS software and masonry wall was modelled through block-based modelling strategy. Large parametric study was carried out to investigate

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Oktay, Emre Hasan. "Finite Element Analysis Of Laboratory Model Experiments On Behavior Of Shallow Foundations Under General Loading." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614210/index.pdf.

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In this study, a series of laboratory model experiments carried on shallow foundations is intended to be simulated through numerical modeling. The laboratory model tests were conducted by Fukui et al. (2005), over square shaped, shallow surfacial foundations located over air-dried Toyoura sand. Tests included centered vertical and combined loading cases on sand with 60% and 80% relative densities. Plastic limit loads obtained from numerical analyses and available analytical solutions in literature are compared to the laboratory test results and the differences are discussed. Employment of Moh

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19

Leidermark, Daniel. "Mechanical Behaviour of Single-Crystal Nickel-Based Superalloys." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10722.

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<p>In this paper the mechanical behaviour, both elastic and plastic, of single-crystal nickel-based superalloys has been investigated. A theoretic base has been established in crystal plasticity, with concern taken to the shearing rate on the slip systems. A model of the mechanical behaviour has been implemented, by using FORTRAN, as a user defined material model in three major FEM-programmes. To evaluate the model a simulated pole figure has been compared to an experimental one. These pole figures match each other very well. Yielding a realistic behaviour of the model.</p>

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20

Abdullah, Ahmad Sufian. "Crash simulation of fibre metal laminate fuselage." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/crash-simulation-of-fibre-metal-laminate-fuselage(fd254489-243f-4071-8dea-ca9e2dd9d3bc).html.

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A finite element model of fibre metal laminate (FML) fuselage was developed in order to evaluate its impact response under survivable crash event. To create a reliable crash finite element (FE) model of FML fuselage, a ‘building block approach’ is adapted. It involves a series of validation and verification tasks in order to establish reliable material and damage models, verified impact model with structural instability and large displacement and verified individual fuselage structure under crash event. This novel development methodology successfully produced an FE model to simulate crash of b

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21

Brennen, Peter Alexander. "SIMULATION OF AN OXIDIZER-COOLED HYBRID ROCKET THROAT: METHODOLOGY VALIDATION FOR DESIGN OF A COOLED AEROSPIKE NOZZLE." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/166.

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A study was undertaken to create a finite element model of a cooled throat converging/diverging rocket nozzle to be used as a tool in designing a cooled aerospike nozzle. Using ABAQUS, a simplified 2D axisymmetric model was created featuring only the copper throat and stainless steel support ring, which were brazed together for the experimental test firings. This analysis was a sequentially coupled thermal/mechanical model. The steady state thermal data matched closely to experimental data. The subsequent mechanical model predicted a life of over 300 cycles using the Manson-Halford fatigue

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22

Rajamanickam, Rajkumar. "Study of delamination of composite hat skin stringer interface failure." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18837.

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The use of composite materials brought a tremendous breakthrough in the scientific world of aerospace engineering. The lack of understanding of the failure of composite materials can be disastrous. Composite laminated structures need to be thoroughly studied and investigated in the design stage. In this thesis, formed-hat skin stringer made of composite laminates is investigated. Delamination is the most common failure of laminated composites, which has two stages delamination onset and delamination propagation. In the preliminary design phase, firstly the structures need to be investigated fo

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23

Birnie, Hernández Johan. "Simulation of crack growth in adhesively bonded joints via cohesive zone models." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amslaurea.unibo.it/25500/.

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Adhesively bonded joints have shown great advantages in the aerospace industry when compared with traditional mechanical fastening methods. These type of joints allow to reduce the overall structural weight, improve the fatigue life characteristics due to reduction of stress concentrations (uniform stress distribution), smooth external finish, sealed surfaces, and many others. One of the main concerns with these joints is their characterization under fatigue loading, i.e. a comprehensive study of crack growth which will allow the development of standardized tests and certification in the aeros

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Rashid, Shahbaz. "Parametric study of bridge response to high speed trains, ballasted track on concrete bridges." Thesis, KTH, Bro- och stålbyggnad, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99385.

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When a train enters a bridge, passenger sitting inside will feel a sudden bump in the track, which not only affect the riding comfort of the passengers but also put a dynamic impact on the bridge structure. Due to this impact force, we have very serious maintenance problems in the track close to the bridge structure. This sudden bump is produced when train travelling on the track suddenly hit by a very stiff medium like bridge structure. In order to reduce this effect, transition zones are introduced before the bridge so that the change in stiffness will occur gradually without producing any b

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Parris, Kadri. "Extension Of Stress-Based Finite Element Model Using Resilient Modulus Material Characterization To Develop A Theoretical Framework for Realistic Response Modeling of Flexible Pavements on Cohesive Subgrades." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437623013.

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Ouakka, Slimane. "On the static strength of reinforced joints." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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The title, On the Static Strength of Reinforced Joints, shows the main subject of this research. The main aim of this study is to analyze the static strength of joints when geometrical and/or mechanical parameters change, by the use of Finite Element (FE) Model. In the current study a FE Model with the use of shell element was modelled as requested from the codes, that for a new configuration of Joints suggest using FE Models, and since this type of strategy are mesh dependent especially for cases where the concentration of stress is sharp it needs to be calibrated by using physical experimen

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Furlanis, Silvia. "Towards a design approach for Wire-and-Arc Additively Manufactured stainless-steel elements." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24627/.

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Additive Manufacturing has become more and more relevant in the recent years in the construction industry, while still being at its initial stage. In particular, Wire-and-Arc Additively Manufactured (WAAM) stainless-steel elements have yet to be properly analyzed from a structural response point-of-view, though many experimental campaigns and studies are being carried out to this day. This study is focused on the analysis of the results of tests conducted on WAAM-produced 308LSi stainless-steel specimens, in order to characterize the mechanical and geometrical properties of the printed mat

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Donnini, Lorenzo. "Numerical modelling of axially loaded piled foundations with physical tests validation." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.

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L'oggetto della tesi è la modellazione numerica di pali di fondazione per turbine eoliche in ambiente offshore. Il metodo di modellazione comprende l'interpretazione di prove CPT per l'estrapolazione dei parametri geotecnici del terreno, la creazione di un modello dell'interazione tra struttura e terreno tramite il software agli elementi finiti Abaqus, la sua verifica, l'ottimizzazione dell'estensione del modello del terreno e della mesh e la simulazione numerica del comportamento di pali caricati assialmente in compressione. Grazie al confronto con i risultati di test su modelli fisici, es

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29

Wills, Andrew Johan. "Abacus-Tournament Models of Hall-Littlewood Polynomials." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/64427.

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In this dissertation, we introduce combinatorial interpretations for three types of HallLittlewood polynomials (denoted Rλ, Pλ, and Qλ) by using weighted combinatorial objects called abacus-tournaments. We then apply these models to give combinatorial proofs of properties of Hall-Littlewood polynomials. For example, we show why various specializations of Hall-Littlewood polynomials produce the Schur symmetric polynomials, the elementary symmetric polynomials, or the t-analogue of factorials. With the abacus-tournament model, we give a bijective proof of a Pieri rule for Hall-Littlewood polynom

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Barrows, Richard James. "Two Dimensional Finite Element Modeling of Swift Delta Soil Nail Wall by "ABAQUS"." PDXScholar, 1994. https://pdxscholar.library.pdx.edu/open_access_etds/4741.

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Soil nail walls are a form of mechanical earth stabilization for cut situations. They consist of the introduction of passive inclusions (nails) into soil cut lifts. These nailed lifts are then tied together with a structural facing (usually shotcrete) . The wall lifts are constructed incrementally from the top of cut down. Soil nail walls are being recognized as having potential for large cost savings over other alternatives. The increasing need to provide high capacity roadways in restricted rights of way under structures such as bridges will require increasing use of techniques such as combi

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31

Courard, Amaury. "PGD-Abaques virtuels pour l'optimisation géométrique des structures." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLN010/document.

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Lors de l'optimisation géométrique de structures, un grand nombre d'évaluations de champs est nécessaire. L'idée, développée dans cette thèse, est la construction efficace et rapide d'approximations de ces champs à travers la Proper Generalized Decomposition (PGD), une méthode de réduction de modèle. Les résultats, calculés une fois pour toutes, sont stockés dans des abaques virtuels pour une utilisation ultérieure dans un processus d'optimisation. Le problème considéré est paramétrique et les paramètres définissent la géométrie. Ce type de problème est particulièrement adapté à la PGD. En eff

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Amini, Khoiy Keyvan. "Biomechanical Characterization and Simulation of the Tricuspid Valve." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1542651986497595.

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Bonorchis, Dean. "Implementation of material models for high strain rate applications as user-subroutines in abaqus/explicit." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/17954.

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Includes bibliographical references.<br>The general purpose finite element program, Abaqus, has the facility to allow users to supplement its existing material model library with user-defined material models (VUMATs). This thesis involves the implementation and verification of the Johnson-Cook and Zerilli-Armstrong material models as VUMATs. The same version of the Johnson-Cook material model is contained in Abaqus and was therefore used as a benchmark. These material models are suitable for high strain, high strain rate and high temperature applications. The implementation of the material mod

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Jakel, Roland. "Lineare und nichtlineare Analyse hochdynamischer Einschlagvorgänge mit Creo Simulate und Abaqus/Explicit." Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-171812.

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Der Vortrag beschreibt wie sich mittels der unterschiedlichen Berechnungsverfahren zur Lösung dynamischer Strukturpobleme der Einschlag eines idealisierten Bruchstücks in eine Schutzwand berechnen lässt. Dies wird mittels zweier kommerzieller FEM-Programme beschrieben: a.) Creo Simulate nutzt zur Lösung die Methode der modalen Superposition, d.h., es können nur lineare dynamische Systeme mit rein modaler Dämpfung berechnet werden. Kontakt zwischen zwei Bauteilen lässt sich damit nicht erfassen. Die unbekannte Kraft-Zeit-Funktion des Einschlagvorganges muss also geeignet abgeschätzt und als äuß

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Montero, Pich Òscar. "Normativització a la presó model de Barcelona abans de 1936." Doctoral thesis, Universitat Autònoma de Barcelona, 2014. http://hdl.handle.net/10803/283889.

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El present estudi analitza el procés de normativització entès com una sèrie d’activitats que cercaven sondejar l’interior del presoner amb la finalitat de corregir el pensament i el comportament del reclús. Aquesta investigació s’ha circumscrit a la Presó Model de Barcelona abans de 1936. Un dels propòsits de la investigació s’ha centrat en l’observació d’unes activitats i d’uns plantejaments teòrics per part d’uns agents amb la intenció de desenvolupar un procés normativitzador. Així, la identificació dels agents correctors ha posat en relleu el paper dels patronats de presos, del metge ant

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Bressan, Caroline Zanini. "Estudo numérico dos ensaios de tração simples e flexão de três pontos do aço livre de interstícios (IF) utilizando o modelo de Gurson modificado." Universidade do Estado de Santa Catarina, 2015. http://tede.udesc.br/handle/handle/2066.

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Made available in DSpace on 2016-12-12T20:25:12Z (GMT). No. of bitstreams: 1 Caroline Zanini Bressan.pdf: 4091231 bytes, checksum: 0de27c28e4c845db49e9a2081c0c7b93 (MD5) Previous issue date: 2015-06-18<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Numerical methods have received a substantial attention from Engineering Professionals especially due their capacity to provide solutions for a wide range of problems in many areas. In the last years, numerical simulation has become increasingly common and has turned into a key factor for solving numerous engineering problems in

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Hahnel, Christopher. "Analysis of Bolted Top and Seat Angle Connection Failure Modes & Fracture Prediction." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1447688781.

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Oliveira, Evelyn Aparecida de. "Modelos computacionais para análise da inﬂuência de parâmetros estatísticos de textura superﬁcial no contato dentário humano". Universidade Federal de Juiz de Fora (UFJF), 2016. https://repositorio.ufjf.br/jspui/handle/ufjf/3297.

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Submitted by isabela.moljf@hotmail.com (isabela.moljf@hotmail.com) on 2017-02-13T14:23:53Z No. of bitstreams: 1 evelynaparecidadeoliveira.pdf: 4026204 bytes, checksum: c1b720f3501ffcd12b38f9d4c877dfa9 (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-02-13T16:49:50Z (GMT) No. of bitstreams: 1 evelynaparecidadeoliveira.pdf: 4026204 bytes, checksum: c1b720f3501ffcd12b38f9d4c877dfa9 (MD5)<br>Made available in DSpace on 2017-02-13T16:49:50Z (GMT). No. of bitstreams: 1 evelynaparecidadeoliveira.pdf: 4026204 bytes, checksum: c1b720f3501ffcd12b38f

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Parimi, Venkata Naga Sai Krishna Janardhan, and Vamsi Eluri. "Stress Analysis of Different Shaped Holes on a Packaging Material." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13613.

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In packaging industries, the demand for usage of Low Density Poly Ethylene foil is of profound interest. In the past, research was carried out on finite and infinite plates with varying crack lengths but having constant crack width. In this thesis, a detailed analysis on crack initiation is carried out on finite plates by varying width of the hole. The hole shapes for stress analysis include circle, ellipse and rectangular notch. Initially, maximum stress is found out using Linear Elastic Fracture Mechanics (LEFM) theory and compared with Finite element method (FEM) results. Secondly using Ela

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Chen, Yifu. "L'étude des différents modes de déplacement des boules du boulier et de l'invention de la méthode de multiplication Kongpan Qianchengfa et son lien avec le calcul mental." Paris 7, 2013. http://www.theses.fr/2013PA070061.

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L'objet de ce travail est, d'une part, de mettre en évidence les différents modes de déplacement des boules du boulier dans les documents publiés en Chine sous les Ming et les Qing, et au Japon à l'époque d'Edo. Il est, d'autre part, de rechercher l'origine possible de l'idée qui a permis l'invention de la méthode de multiplication Kongpan qiancheng, effectuée à l'aide du boulier. Concernant l'étude des modes de déplacement des boules du boulier, nous avons établi une méthode insistant sur le contexte du déplacement des boules du boulier dans les opérations, ce qui nous a amené à procéder l'ét

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Rolseth, Anton, and Anton Gustafsson. "Implementation of thermomechanical laser welding simulation : Predicting displacements of fusing A AISI304 T-JOINT." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-19946.

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Laser welding is an advanced joining technique with the capability to form deep, narrow, and precise welds. Numerical models are used to simulate the process in attempts of predicting distortions and stresses in the material. This is done to reduce physical testing, optimize processes and enable integrated product- and process development. The Virtual Manufacturing Process research group at University of Skövde wishes to increase their knowledge on modeling options of thermomechanical simulations to grant local industries these benefits. A numerical model for the laser welding process was deve

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Scalone, Santiago Andres. "A numerical evaluation of mode I & II damage propagation in composite materials." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15914/.

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A full numerical evaluation using Abaqus has been done for 2D and 3D Mode I and II delamination propagation (in composite materials). First the theory to explain all the mechanisms that are involved in delamination growth were developed, also the theory that Abaqus uses to solve the delamination process was explained. Furthermore, all the values that have been used were explained in detail, these values are difficult to find. Then, the results were obtained combining the delamination theory with Matlab. The parameters that have been analyzed are: critical strain energy release rate, the most r

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Lu, Ye. "Construction d’abaques numériques dédiés aux études paramétriques du procédé de soudage par des méthodes de réduction de modèles espace-temps." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI103/document.

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Le recours à des simulations numériques pour l’étude de l’influence des paramètres d’entrée (matériaux, chargements, conditions aux limites, géométrie, etc.) sur les différentes quantités d’intérêt en soudage (contraintes résiduelles, distorsion, etc.) s’avère trop long et coûteux vu l’aspect multi-paramétrique de ces simulations. Pour explorer des espaces paramétriques de grandes dimensions, avec des calculs moins coûteux, il parait opportun d’utiliser des approches de réduction de modèle. Dans ce travail, d’une façon a posteriori, une stratégie non-intrusive est développée pour construire le

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Seon, Guillaume. "Finite element-based failure models for carbon/epoxy tape composites." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28117.

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Plaza, Floren. "Measuring, modelling and understanding the mechanical behavior of bagasse." Thesis, University of Southern Queensland, 2003. https://eprints.qut.edu.au/74742/1/Thesis_bagasse_mechanical_behaviour.pdf.

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In the Australian sugar industry, sugar cane is smashed into a straw like material by hammers before being squeezed between large rollers to extract the sugar juice. The straw like material is initially called prepared cane and then bagasse as it passes through successive roller milling units. The sugar cane materials are highly compressible, have high moisture content, are fibrous, and they resemble some peat soils in both appearance and mechanical behaviour. A promising avenue to improve the performance of milling units for increased throughput and juice extraction, and to reduce costs is

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Kesawan, Sivakumar. "Fire performance and design of light gauge steel frame wall systems made of hollow flange sections." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/120153/1/Kesawan_Sivakumar_Thesis.pdf.

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Load bearing Light Gauge Steel Frame (LSF) wall system is a cold-formed steel structure made of cold-formed steel studs and lined on both sides by gypsum plasterboards. In recent times its use and demand in the building industry has significantly increased due to their advantages such as light weight, acoustic performance, aesthetic quality of finished wall, ease of fabrication and rapid constructability. Fire Resistant Rating (FRR) of these walls is given more attention due to the increasing number and severity of fire related accidents in residential buildings that have caused significant lo

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Fardmoshiri, Mohamad. "Advances in Hopkinson bar tests: calibration of constitutive models at high strain rate using finite element method updating and image processing." Doctoral thesis, Università Politecnica delle Marche, 2016. http://hdl.handle.net/11566/243086.

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Questa tesi concerne lo sviluppo di un sistema di processamento di dati fisici e sperimentali per test ad elevata velocità di deformazione tramite la barra di Hopkinson. La barra di Hopkison è la tipologia di test più utilizzata comunemente per svolgere test dinamici, determinando le proprietà dei materiali caratterizzandone la risposta dinamica ad elevate velocità di deformazione. Utilizzando una barra di Hopkinson progettata e realizzata recentemente dal gruppo di costruzione di macchine della Università Politecnica delle Marche, dati sperimentali accurati e precisi cosi come immagini cattur

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Susila, Gede Adi. "Experimental and numerical studies of masonry wall panels and timber frames of low-rise structures under seismic loadings in Indonesia." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/experimental-and-numerical-studies-of-masonry-wall-panels-and-timber-frames-of-lowrise-structures-under-seismic-loadings-in-indonesia(3ceb094b-4e6e-432a-b3de-3d4c306b0551).html.

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Indonesia is a developing country that suffers from earthquakes and windstorms and where at least 60% of houses are non-engineered structures, built by unskilled workers using masonry and timber. The non-engineered housing units developed in urban region are also vulnerable to seismic hazard due to the use of low quality of material and constructions method. Those structures are not resistant to extreme lateral loads or ground movement and their failure during an earthquake or storm can lead to significant loss of life. This thesis is concerned with the structural performance of Indonesian low

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Canales, Aguilera Diego. "Stratégies numériques avancées pour la simulation efficace de procédés de soudage conventionnels et non conventionnels : Une approche de réduction de modèles." Thesis, Ecole centrale de Nantes, 2017. http://www.theses.fr/2017ECDN0012/document.

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Les simulations numériques représentent un outil fondamental pour la conception et l'optimisation de procédés industriels de fabrication tels que le soudage. Malgré le développement impressionnant des méthodes numériques et des moyens de calcul utilisables, la complexité des procédés de fabrication et les nouvelles exigences des industries les plus avancées obligent à repenser les méthodes, les stratégies et les algorithmes de simulation disponibles. Dans cette thèse, de nouvelles méthodes numériques avec une approche de Réduction des Modèles sont proposées, une discipline consolidée qui a fou

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Nogueira, Filho Ricardo. "Análise e controlo da rigidez de estruturas de prensas com tirantes pré-tensionados." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/18368.

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Mestrado em Engenharia Mecânica<br>As prensas são máquinas de conformação de chapa metálica capazes de elevada produtividade e qualidade de itens fabricados. Dado a intensidade de força exigida à estrutura resistente, o seu projeto deve observar o melhor equilíbrio de rigidez e massa investida, dado que a diminuição desta última pode levar a menor robustez do corpo da prensa. Há exigentes especificações referentes ao nível de deslocamentos e rotações decorrentes do esforço em trabalho. O uso de módulos ligados por tirantes permite não só menos complexidade no projeto dos elementos estru

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