Stress and strain fluctuations in plastic deformation of crystals with disordered microstructure
Kapetanou O, Weygand D, Zaiser M (2015)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2015
Journal
Publisher: Institute of Physics: Hybrid Open Access
DOI: 10.1088/1742-5468/2015/08/P08009
Abstract
We investigate the spatial structure of stress and strain patterns in crystal plasticity. To this end, we combine theoretical arguments with plasticity simulations using three different models: (i) a generic model of bulk crystal plasticity with stochastic evolution of the local microstructure, (ii) a 2D discrete dislocation simulation assuming single-slip deformation in a bulk crystal, and (iii) a 3D discrete dislocation model for deformation of micropillars in multiple slip. For all three models we investigate the scale-dependent magnitude of local fluctuations of internal stress and plastic strain, and we determine the spatial structure of the respective auto- and cross-correlation functions. The investigations show that, in the course of deformation, nontrivial long range correlations emerge in the stress and strain patterns. We investigate the influence of boundary conditions on the observed spatial patterns of stress and strain, and discuss implications of our findings for larger-scale plasticity models.
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Germany (DE)How to cite
APA:
Kapetanou, O., Weygand, D., & Zaiser, M. (2015). Stress and strain fluctuations in plastic deformation of crystals with disordered microstructure. Journal of Statistical Mechanics-Theory and Experiment. https://dx.doi.org/10.1088/1742-5468/2015/08/P08009
MLA:
Kapetanou, Olga, Daniel Weygand, and Michael Zaiser. "Stress and strain fluctuations in plastic deformation of crystals with disordered microstructure." Journal of Statistical Mechanics-Theory and Experiment (2015).
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