Single Crystal Gradient Plasticity With An Accumulated Plastic Slip Theory And Applications
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Single Crystal Gradient Plasticity With An Accumulated Plastic Slip Theory And Applications
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Author : Eric Bayerschen
language : en
Publisher: KIT Scientific Publishing
Release Date : 2016
Single Crystal Gradient Plasticity With An Accumulated Plastic Slip Theory And Applications written by Eric Bayerschen 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 2016 with Technology (General) categories.
In experiments on metallic microwires, size effects occur as a result of the interaction of dislocations with, e.g., grain boundaries. In continuum theories this behavior can be approximated using gradient plasticity. A numerically efficient geometrically linear gradient plasticity theory is developed considering the grain boundaries and implemented with finite elements. Simulations are performed for several metals in comparison to experiments and discrete dislocation dynamics simulations.
Single Crystal Gradient Plasticity With An Accumulated Plastic Slip
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Author : Eric Bayerschen
language : en
Publisher:
Release Date : 2017
Single Crystal Gradient Plasticity With An Accumulated Plastic Slip written by Eric Bayerschen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
In experiments on metallic microwires, size effects occur as a result of the interaction of dislocations with, e.g., grain boundaries. In continuum theories this behavior can be approximated using gradient plasticity. A numerically efficient geometrically linear gradient plasticity theory is developed considering the grain boundaries and implemented with finite elements. Simulations are performed for several metals in comparison to experiments and discrete dislocation dynamics simulations.
A Gradient Crystal Plasticity Theory Based On An Extended Energy Balance
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Author : Prahs, Andreas
language : en
Publisher: KIT Scientific Publishing
Release Date : 2020-09-15
A Gradient Crystal Plasticity Theory Based On An Extended Energy Balance written by Prahs, Andreas 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 2020-09-15 with Technology & Engineering categories.
An overview of different methods for the derivation of extended continuum models is given. A gradient plasticity theory is established in the context of small deformations and single slip by considering the invariance of an extended energy balance with respect to Euclidean transformations, where the plastic slip is considered as an additional degree of freedom. Thermodynamically consistent flow rules at the grain boundary are derived. The theory is applied to a two- and a three-phase laminate.
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.
Microstructure Modeling And Crystal Plasticity Parameter Identification For Predicting The Cyclic Mechanical Behavior Of Polycrystalline Metals
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Author : Kuhn, Jannick
language : en
Publisher: KIT Scientific Publishing
Release Date : 2023-04-04
Microstructure Modeling And Crystal Plasticity Parameter Identification For Predicting The Cyclic Mechanical Behavior Of Polycrystalline Metals written by Kuhn, Jannick 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 2023-04-04 with Technology & Engineering categories.
Computational homogenization permits to capture the influence of the microstructure on the cyclic mechanical behavior of polycrystalline metals. In this work we investigate methods to compute Laguerre tessellations as computational cells of polycrystalline microstructures, propose a new method to assign crystallographic orientations to the Laguerre cells and use Bayesian optimization to find suitable parameters for the underlying micromechanical model from macroscopic experiments.
Fiber Orientation Tensors And Mean Field Homogenization Application To Sheet Molding Compound
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Author : Bauer, Julian Karl
language : en
Publisher: KIT Scientific Publishing
Release Date : 2023-02-27
Fiber Orientation Tensors And Mean Field Homogenization Application To Sheet Molding Compound written by Bauer, Julian Karl 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 2023-02-27 with Technology & Engineering categories.
Effective mechanical properties of fiber-reinforced composites strongly depend on the microstructure, including the fibers' orientation. Studying this dependency, we identify the variety of fiber orientation tensors up to fourth-order using irreducible tensors and material symmetry. The case of planar fiber orientation tensors, relevant for sheet molding compound, is presented completely. Consequences for the reconstruction of fiber distributions and mean field homogenization are presented.
Finite Element Simulation Of Dislocation Based Plasticity And Diffusion In Multiphase Materials At High Temperature
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Author : Albiez, Jürgen
language : en
Publisher: KIT Scientific Publishing
Release Date : 2019-05-22
Finite Element Simulation Of Dislocation Based Plasticity And Diffusion In Multiphase Materials At High Temperature written by Albiez, Jürgen 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 2019-05-22 with Technology & Engineering categories.
A single-crystal plasticity model as well as a gradient crystal plasticity model are used to describe the creep behavior of directionally solidi?ed NiAl based eutectic alloys. To consider the transition from theoretical to bulk strength, a hardening model was introduced to describe the strength of the reinforcing phases. Moreover, to account for microstructural changes due to material ?ux, a coupled diffusional-mechanical simulation model was introduced.
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.
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.
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.