Two Scale Thermomechanical Simulation Of Hot Stamping
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Two Scale Thermomechanical Simulation Of Hot Stamping
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Author : Neumann, Rudolf
language : en
Publisher: KIT Scientific Publishing
Release Date : 2017-10-27
Two Scale Thermomechanical Simulation Of Hot Stamping written by Neumann, Rudolf and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-27 with Technology (General) categories.
Hot stamping is a hot drawing process which takes advantage of the polymorphic steel behavior to produce parts with a good strength-to-weight ratio. For the simulation of the hot stamping process, a nonlinear two-scale thermomechanical model is suggested and implemented into the FE tool ABAQUS. Phase transformation and transformation induced plasticity effects are taken into account. The simulation results regarding the final shape and residual stresses are compared to experimental findings.
Deep Material Networks For Efficient Scale Bridging In Thermomechanical Simulations Of Solids
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Author : Gajek, Sebastian
language : en
Publisher: KIT Scientific Publishing
Release Date : 2023-08-25
Deep Material Networks For Efficient Scale Bridging In Thermomechanical Simulations Of Solids written by Gajek, Sebastian and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-08-25 with categories.
We investigate deep material networks (DMN). We lay the mathematical foundation of DMNs and present a novel DMN formulation, which is characterized by a reduced number of degrees of freedom. We present a efficient solution technique for nonlinear DMNs to accelerate complex two-scale simulations with minimal computational effort. A new interpolation technique is presented enabling the consideration of fluctuating microstructure characteristics in macroscopic simulations.
Thermomechanical Modeling And Experimental Characterization Of Sheet Molding Compound Composites
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Author : Lang, Juliane
language : en
Publisher: KIT Scientific Publishing
Release Date : 2023-06-28
Thermomechanical Modeling And Experimental Characterization Of Sheet Molding Compound Composites written by Lang, Juliane and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-06-28 with categories.
The aim of this work is to model and experimentally characterize the anisotropic material behavior of SMC composites on the macroscale with consideration of the microstructure. Temperature-dependent thermoelastic behavior and failure behavior are modeled and the corresponding material properties are determined experimentally. Additionally, experimental biaxial damage investigations are performed. A parameter identification merges modeling and experiments and validates the models.
Thermomechanical Mean Field Modeling And Experimental Characterization Of Long Fiber Reinforced Sheet Molding Compound Composites
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Author : Kehrer, Maria Loredana
language : en
Publisher: KIT Scientific Publishing
Release Date : 2019-06-13
Thermomechanical Mean Field Modeling And Experimental Characterization Of Long Fiber Reinforced Sheet Molding Compound Composites written by Kehrer, Maria Loredana and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-06-13 with Technology & Engineering categories.
A discontinuous fiber-reinforced thermoset material produced by the Sheet Molding Compound process is investigated. Due to the process-related fiber orientation distribution, a composite with an anisotropic microstructure is created which crucially affects the mechanical properties. The central objectives are the modeling of the thermoelastic behavior of the composite accounting for the underlying microstructure, and the experimental characterization of the pure resin and the composite material.
Efficient Fast Fourier Transform Based Solvers For Computing The Thermomechanical Behavior Of Applied Materials
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Author : Wicht, Daniel
language : en
Publisher: KIT Scientific Publishing
Release Date : 2022-10-11
Efficient Fast Fourier Transform Based Solvers For Computing The Thermomechanical Behavior Of Applied Materials written by Wicht, Daniel and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-10-11 with Science categories.
The mechanical behavior of many applied materials arises from their microstructure. Thus, to aid the design, development and industrialization of new materials, robust computational homogenization methods are indispensable. The present thesis is devoted to investigating and developing FFT-based micromechanics solvers for efficiently computing the (thermo)mechanical response of nonlinear composite materials with complex microstructures.
On Multi Scale Modeling Of Fatigue In Short Glass Fiber Reinforced Thermoplastics
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Author : Hessman, Patrick Arthur
language : en
Publisher: KIT Scientific Publishing
Release Date : 2025-03-31
On Multi Scale Modeling Of Fatigue In Short Glass Fiber Reinforced Thermoplastics written by Hessman, Patrick Arthur and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-03-31 with categories.
This work covers the topic of micromechanical modeling of the elastic and fatigue behavior of short glass fiber reinforced thermoplastic composites (SFRTs). A novel algorithm extracts microstructural data from x-ray micro-computed tomography scans. Analytical homogenization schemes are studied and used to predict elastic properties, while a high cycle fatigue model using the Two-Step scheme incorporates damage variables for fibers and matrix, predicting fatigue limits.
Modeling Martensitic Phase Transformation In Dual Phase Steels Based On A Sharp Interface Theory
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Author : Ruck, Johannes
language : en
Publisher: KIT Scientific Publishing
Release Date : 2021-05-07
Modeling Martensitic Phase Transformation In Dual Phase Steels Based On A Sharp Interface Theory written by Ruck, Johannes and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-05-07 with Technology & Engineering categories.
artensite forms under rapid cooling of austenitic grains accompanied by a change of the crystal lattice. Large deformations are induced which lead to plastic dislocations. In this work a transformation model based on the sharp interface theory, set in a finite strain context is developed. Crystal plasticity effects, the kinetic of the singular surface as well as a simple model of the inheritance from austenite dislocations into martensite are accounted for.
A Computational Multi Scale Approach For Brittle Materials
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Author : Ernesti, Felix
language : en
Publisher: KIT Scientific Publishing
Release Date : 2023-04-17
A Computational Multi Scale Approach For Brittle Materials written by Ernesti, Felix and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-04-17 with Technology & Engineering categories.
Materials of industrial interest often show a complex microstructure which directly influences their macroscopic material behavior. For simulations on the component scale, multi-scale methods may exploit this microstructural information. This work is devoted to a multi-scale approach for brittle materials. Based on a homogenization result for free discontinuity problems, we present FFT-based methods to compute the effective crack energy of heterogeneous materials with complex microstructures.
Microstructure Generation And Micromechanical Modeling Of Sheet Molding Compound Composites
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Author : Görthofer, Johannes
language : en
Publisher: KIT Scientific Publishing
Release Date : 2022-09-13
Microstructure Generation And Micromechanical Modeling Of Sheet Molding Compound Composites written by Görthofer, Johannes and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-09-13 with Technology & Engineering categories.
Wir präsentieren einen Algorithmus zur schnellen Erzeugung von SMC Mikrostrukturen hoher Güte, durch Verwendung einer exakten Schließung und eines quasi-zufälligen Samplings. Darüber hinaus stellen wir ein modulares Framework zur Modellierung anisotroper Schädigung vor. Unser Konzept der Extraktionstensoren und Schädigungsfunktionen ermöglicht die Beschreibung komplexer Vorgänge. Darüber hinaus schlagen wir einen ganzheitlichen Multiskalenansatz zur Bestimmung anisotroper Versagenskriterien vor. - We introduce an algorithm that allows for a fast generation of SMC composite microstructures. An exact closure approximation and a quasi-random orientation sampling ensure high fidelity. Furthermore, we present a modular framework for anisotropic damage evolution. Our concept of extraction tensors and damage-hardening functions enables the description of complex damage-degradation. In addition, we propose a holistic multiscale approach for constructing anisotropic failure criteria.
Modeling Of Dislocation Grain Boundary Interactions In Gradient Crystal Plasticity Theories
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Author : Erdle, Hannes
language : en
Publisher: KIT Scientific Publishing
Release Date : 2022-07-12
Modeling Of Dislocation Grain Boundary Interactions In Gradient Crystal Plasticity Theories written by Erdle, Hannes and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-07-12 with Technology & Engineering categories.
A physically-based dislocation theory of plasticity is derived within an extended continuum mechanical context. Thermodynamically consistent flow rules at the grain boundaries are derived. With an analytical solution of a three-phase periodic laminate, dislocation pile-up at grain boundaries and dislocation transmission through the grain boundaries are investigated. For the finite element implementations, numerically efficient approaches are introduced based on accumulated field variables.