Modeling and simulation of inelastic microstructure development and inhomogeneous material behavior via non-convex rate dependent gradient plasticity

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In this study, a two-dimensional rate-dependent gradient crystal plasticity model for non-convex energetic hardening is formulated and applied to the simulation of inelastic microstructure formation. In particular, non-convex hardening is modeled via a Landau- Devonshire potential for self-hardening and an interaction-matrix-based form for latent hardening. The algorithmic formulation and numerical implementation treats the displacement and glide-system slips as the primary field variables. Example numerical simulations are carried out for the case of tensile loading with periodic displacement and slip boundary conditions. The results for the formation of inelastic microstructures and their evolution under mechanical loading are compared and correlated features of the macroscopic stress-strain response such as stress relaxation.

Original languageEnglish
Title of host publicationECCOMAS 2012 : Proceedings of the 6th EUROPEAN CONGRESS ON COMPUTATIONAL METHODS IN APPLIED SCIENCES AND ENGINEERING
EditorsTuncay Yalcinkaya, Bob Svendsen
Number of pages11
PublisherTechnische Universität Wien
Publication date2012
Pages1005-1015
ISBN (print)978-395035370-9
Publication statusPublished - 2012
Externally publishedYes
Event6th European Congress on Computational Methods in Applied Sciences and Engineering - ECCOMAS 2012 - Wien, Austria
Duration: 10.09.201214.09.2012
Conference number: 6
http://www.eccomas.org/space/1/7/proceedings---congresses