Alexander Vondrous

Karlsruhe University of Applied Sciences

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Britta Nestler

Karlsruhe Institute of Technology

Michael Selzer

Karlsruhe University of Applied Sciences

Johannes Hötzer

Karlsruhe Institute of Technology

Mathias Reichardt

Technische Universität Braunschweig

Anastasia August

Karlsruhe Institute of Technology

Daniel Schneider

Karlsruhe Institute of Technology

Reiner Mönig

Karlsruhe Institute of Technology

Doris Ressmann

Karlsruhe Institute of Technology

Simone Schreijäg

Karlsruhe Institute of Technology

Michael J. Hoffmann

Karlsruhe Institute of Technology

Cooperative Institutions

Karlsruhe Institute of Technology

Karlsruhe University of Applied Sciences

Applied Materials (Germany)

RWTH Aachen University

Karlsruhe University of Education

FZI Research Center for Information Technology

FIZ Karlsruhe – Leibniz Institute for Information Infrastructure

Nagaoka University

Nagaoka University of Technology

San Diego State University

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Combined crystal plasticity and phase-field method for recrystallization in a process chain of sheet metal production

Computational Mechanics (2015)

Alexander Vondrous Pierre Bienger Simone Schreijäg Michael Selzer Daniel Schneider

Recrystallization (geology)

Dynamic Recrystallization

Crystal Plasticity

10.1007/s00466-014-1115-0

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Citations (36)

Metallic Foam Structures, Dendrites and Implementation Optimizations for Phase-Field Modeling

Springer eBooks (2012)

Alexander Vondrous Britta Nestler Anastasia August Eugenia Wesner Abhik Choudhury

Dendrite (mathematics)

Message Passing Interface

10.1007/978-3-642-23869-7_43

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Citations (4)

Beamline data management at ANKA

Alexander Vondrous Thomas Jejkal Doris Ressmann W. Mexner Rainer Stotzka

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Grain growth behavior and efficient large scale simulations of recrystallization with the phase-field method

Alexander Vondrous

This book summarizes the found insights of grain growth behavior, of multidimensional decomposition for regular grids to efficiently parallelize computing and how to simulate recrystallization by coupling the finite element method with the phase-field method for microstructure texture analysis. The frame of the book is created by the phase-field method, which is the tool used in this work, to investigate microstructure phenomena. Umfang: VI, 136 S. Preis: €41.00 | £38.00 | $72.00

Recrystallization (geology)

Phase-Field Models

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Parallel computing for phase-field models

The International Journal of High Performance Computing Applications (2013)

Alexander Vondrous Michael Selzer Johannes Hötzer Britta Nestler

The phase-field method is gradually exploiting new research areas, and the demand for the ability to simulate larger domains is increasing continuously with the move towards massive parallel computation. We emphasize the efficient usage of high-performance computing resources by investigating the scaling behavior of 1D domain decomposition, 3D domain decomposition and the runtime behavior of the commonly used moving simulation domain as well as 1D load balancing for a finite difference phase-field implementation. A simple performance model for blocking communication and measurements shows that it is necessary to apply 3D domain decomposition for a 3D domain to scale on high-performance clusters.

Blocking (statistics)

10.1177/1094342013490972

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Citations (63)

Subkorngenerierung in plastisch deformierten MikroStrukturen im kombinierten Simulationsprozess Walzen und Glühen zur statischen Rekristallisation mit der Phasenfeldmethode

Alexander Vondrous Melvin L. Selzer B. Nestler

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Phase-Field Simulations of Large-Scale Microstructures by Integrated Parallel Algorithms

Springer eBooks (2014)

Johannes Hötzer Marcus Jainta Alexander Vondrous Jörg Ettrich Anastasia August

Recrystallization (geology)

Component (thermodynamics)

Granularity

10.1007/978-3-319-10810-0_41

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Citations (3)

Phase‐Field Modeling of Diffusion Coupled Crack Propagation Processes

Advanced Engineering Materials (2013)

Daniel Schneider Michael Selzer Johannes Bette Idoia Rementeria Alexander Vondrous

Computational models based on the phase-field method operate on a mesoscopic length scale providing microstructure and mechanical property relations. We derive a quantitative phase-field model capable of describing the coupled diffusion of the surrounding water and the stress evolution during dynamic fracture formation under applied load in glass materials.

Mesoscopic physics

Phase-Field Models

Multiscale Modeling

10.1002/adem.201300073

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Citations (15)

Growth rate distributions for regular two-dimensional grains with Read–Shockley grain boundary energy

Modelling and Simulation in Materials Science and Engineering (2014)

Alexander Vondrous Mathias Reichardt Britta Nestler

Understanding the effects of an anisotropic grain boundary energy model is difficult analytically, so simulations provide a valuable insight into the dynamics and characteristics of grain structure evolution. A brute-force analysis of the common Read–Shockley model in two dimensions for grains of the topological class of n-sided grains with 3 ⩽ n ⩽ 8 is performed. In this approach, we rotate all cubic two-dimensional crystal lattices of n-sided grain neighbors stepwise with high resolution in two dimensions, and compute the growth rates of each configuration to obtain detailed growth rate distributions. To perform the computationally intense task of computing the growth rates for billions of configurations, a vertex type model and a supercomputer are utilized. Modern computation facilities deliver the required computation power to carry out such studies in a reasonable amount of time. The vertex model is validated by comparison with 700 phase-field simulations. Our findings support the isotropic behavior of grain structures with randomly oriented lattices and Read–Shockley grain boundary energy, where the average values of the growth rate distributions follow the isotropic Neumann–Mullins relation. Further, all computed growth rate distributions are not symmetric and adapt a normal distribution for n → 8. Abnormal grain growth does not occur for the Read–Shockley model with neighbors in the range 3 ⩽ n ⩽ 8. The brute-force method of scanning the parameter space in high resolution reaches its limit fast, but contributes a new perspective.

10.1088/0965-0393/22/2/025014

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Citations (19)