Modeling Martensitic Phase Transformation In Dual Phase Steels Based On A Sharp Interface Theory

Author : Ruck, Johannes
Publisher : KIT Scientific Publishing
Page : 220 pages
File Size : 53,8 Mb
Release : 2021-05-07
Category : Technology & Engineering
ISBN : 9783731510727

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Modeling martensitic phase transformation in dual phase steels based on a sharp interface theory by Ruck, Johannes Pdf

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.

Author : Erdle, Hannes
Publisher : KIT Scientific Publishing
Page : 184 pages
File Size : 48,5 Mb
Release : 2022-07-12
Category : Technology & Engineering
ISBN : 9783731511960

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Modeling of Dislocation - Grain Boundary Interactions in Gradient Crystal Plasticity Theories by Erdle, Hannes Pdf

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.

Author : Lang, Juliane
Publisher : KIT Scientific Publishing
Page : 250 pages
File Size : 42,6 Mb
Release : 2023-06-28
Category : Electronic
ISBN : 9783731512325

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Thermomechanical Modeling and Experimental Characterization of Sheet Molding Compound Composites by Lang, Juliane Pdf

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.

Author : Kuhn, Jannick
Publisher : KIT Scientific Publishing
Page : 224 pages
File Size : 50,9 Mb
Release : 2023-04-04
Category : Technology & Engineering
ISBN : 9783731512721

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Microstructure modeling and crystal plasticity parameter identification for predicting the cyclic mechanical behavior of polycrystalline metals by Kuhn, Jannick Pdf

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.

Author : Görthofer, Johannes
Publisher : KIT Scientific Publishing
Page : 258 pages
File Size : 42,9 Mb
Release : 2022-09-13
Category : Technology & Engineering
ISBN : 9783731512059

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Microstructure generation and micromechanical modeling of sheet molding compound composites by Görthofer, Johannes Pdf

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.

Author : Wicht, Daniel
Publisher : KIT Scientific Publishing
Page : 336 pages
File Size : 48,6 Mb
Release : 2022-10-11
Category : Science
ISBN : 9783731512202

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Efficient fast Fourier transform-based solvers for computing the thermomechanical behavior of applied materials by Wicht, Daniel Pdf

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.

Author : Ernesti, Felix
Publisher : KIT Scientific Publishing
Page : 264 pages
File Size : 44,8 Mb
Release : 2023-04-17
Category : Technology & Engineering
ISBN : 9783731512851

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A computational multi-scale approach for brittle materials by Ernesti, Felix Pdf

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.

Author : Gajek, Sebastian
Publisher : KIT Scientific Publishing
Page : 326 pages
File Size : 47,9 Mb
Release : 2023-08-25
Category : Electronic
ISBN : 9783731512783

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Deep material networks for efficient scale-bridging in thermomechanical simulations of solids by Gajek, Sebastian Pdf

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.

Author : Bauer, Julian Karl
Publisher : KIT Scientific Publishing
Page : 252 pages
File Size : 49,7 Mb
Release : 2023-02-27
Category : Technology & Engineering
ISBN : 9783731512622

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Fiber Orientation Tensors and Mean Field Homogenization: Application to Sheet Molding Compound by Bauer, Julian Karl Pdf

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.

Author : Robert Honeycombe,H. K. D. H. Bhadeshia
Publisher : John Wiley & Sons
Page : 340 pages
File Size : 40,8 Mb
Release : 1996-02-12
Category : Technology & Engineering
ISBN : UOM:39076001647770

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Steels by Robert Honeycombe,H. K. D. H. Bhadeshia Pdf

The properties of steels depend critically on their microstructure. By examining the mechanical properties of steels in conjunction with microstructure, the first edition gave a clear description of the development and behavior of these materials - the very foundation of their widespread use. This new edition more explicitly links this theory with applications while retaining the style and purpose of its predecessor.

Author : Zenji Nishiyama
Publisher : Elsevier
Page : 480 pages
File Size : 44,8 Mb
Release : 2012-12-02
Category : Technology & Engineering
ISBN : 9780323148818

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Martensitic Transformation by Zenji Nishiyama Pdf

Martensitic Transformation examines martensitic transformation based on the known crystallographical data. Topics covered range from the crystallography of martensite to the transformation temperature and rate of martensite formation. The conditions for martensite formation and stabilization of austenite are also discussed, along with the crystallographic theory of martensitic transformations. Comprised of six chapters, this book begins with an introduction to martensite and martensitic transformation, with emphasis on the basic properties of martensite in steels such as carbon steels. The next two chapters deal with the crystallography of martensite and discuss the martensitic transformation behavior of the second-order transition; lattice imperfections in martensite; and close-packed layer structures of martensites produced from ? phase in noble-metal-base alloys. Thermodynamical problems and kinetics are also analysed, together with conditions for the nucleation of martensite and problems concerning stabilization of austenite. The last chapter discusses the theory of the mechanism underlying martensitic transformation. This monograph will be of interest to metallurgists and materials scientists.

Author : Cemil Hakan Gur,Jiansheng Pan
Publisher : CRC Press
Page : 754 pages
File Size : 49,6 Mb
Release : 2008-12-22
Category : Technology & Engineering
ISBN : 9781420003581

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Handbook of Thermal Process Modeling Steels by Cemil Hakan Gur,Jiansheng Pan Pdf

An Emerging Tool for Pioneering Engineers Co-published by the International Federation of Heat Treatment and Surface Engineering.Thermal processing is a highly precise science that does not easily lend itself to improvements through modeling, as the computations required to attain an accurate prediction of the microstructure and properties of work

Author : Nikolas Provatas,Ken Elder
Publisher : John Wiley & Sons
Page : 323 pages
File Size : 40,7 Mb
Release : 2011-07-26
Category : Computers
ISBN : 9783527632374

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Phase-Field Methods in Materials Science and Engineering by Nikolas Provatas,Ken Elder Pdf

This comprehensive and self-contained, one-stop source discusses phase-field methodology in a fundamental way, explaining advanced numerical techniques for solving phase-field and related continuum-field models. It also presents numerical techniques used to simulate various phenomena in a detailed, step-by-step way, such that readers can carry out their own code developments. Features many examples of how the methods explained can be used in materials science and engineering applications.

Author : Anonim
Publisher : Unknown
Page : 712 pages
File Size : 54,8 Mb
Release : 1995
Category : Metallurgy
ISBN : MINN:31951D01197227V

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Metals Abstracts by Anonim Pdf

Author : David E. Laughlin,Kazuhiro Hono
Publisher : Newnes
Page : 2963 pages
File Size : 47,8 Mb
Release : 2014-07-24
Category : Technology & Engineering
ISBN : 9780444537713

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Physical Metallurgy by David E. Laughlin,Kazuhiro Hono Pdf

This fifth edition of the highly regarded family of titles that first published in 1965 is now a three-volume set and over 3,000 pages. All chapters have been revised and expanded, either by the fourth edition authors alone or jointly with new co-authors. Chapters have been added on the physical metallurgy of light alloys, the physical metallurgy of titanium alloys, atom probe field ion microscopy, computational metallurgy, and orientational imaging microscopy. The books incorporate the latest experimental research results and theoretical insights. Several thousand citations to the research and review literature are included. Exhaustively synthesizes the pertinent, contemporary developments within physical metallurgy so scientists have authoritative information at their fingertips Replaces existing articles and monographs with a single, complete solution Enables metallurgists to predict changes and create novel alloys and processes