Crysal Plasticity Finite Element Simulations based on Continuum Dislocation Dynamics

Alireza Ebrahimi, Thomas Hochrainer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Plastic deformation of crystalline materials is the result of the motion and interaction of dislocations. Continuum dislocation dynamics (CDD) defines flux-type evolution equations of dislocation variables which can capture the kinematics of moving curved dislocations. Coupled with Orowan's law, which connects the plastic shear rate to the dislocation flux, CDD defines a dislocation density based material law for crystal plasticity. In the current work we provide simulations of a micro-bending experiment of a single crystal and compare the results qualitatively to those from discrete dislocation simulations from the literature. We show that CDD reproduces salient features from discrete dislocation simulations regarding the stress distribution, the dislocation density and the accumulated plastic shear, which would be hard to obtain from more traditional crystal plasticity constitutive laws. © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)
Original languageEnglish
Title of host publicationProceedings in Applied Mathematics and Mechanics PAMM
Pages325-326
Volume16
Edition1
DOIs
Publication statusPublished - 2016

ASJC Scopus subject areas

  • Materials Science(all)

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