| Issue |
EPJ Web Conf.
Volume 140, 2017
Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 02004 | |
| Number of page(s) | 4 | |
| Section | Granular solids | |
| DOI | https://doi.org/10.1051/epjconf/201714002004 | |
| Published online | 30 June 2017 | |
https://doi.org/10.1051/epjconf/201714002004
Influence of particle deformation on the plastic flow of ductile granular materials
1 Univ. Grenoble Alpes, 3SR, F-38000 Grenoble, France
2 CNRS, 3SR, F-38000 Grenoble, France
* e-mail: barthelemy.harthong@3sr-grenoble.fr
Published online: 30 June 2017
A multi-particle finite-element method was proposed to study the elastic-plastic behaviour of ductile powders composed of highly deformable elastic-plastic particles. The focus was put on the study of the uniqueness of the direction of plastic strain increment vectors for a given stress state on the plastic limit, which was assessed using a spherical stress-probing method. Results revealed a non-uniqueness of the direction of plastic flow in a small region of the stress space located in the vicinity of the loading point. The direction of plastic flow was almost unique elsewhere on the plastic limit. The non-uniqueness was explained using a combination of two distinct mechanisms for plastic deformation involving two very different plastic limits.
© The Authors, published by EDP Sciences, 2017
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