Sliding and rolling dissipation in Cosserat plasticity

TitleSliding and rolling dissipation in Cosserat plasticity
Publication TypeJournal Article
Year of Publication2011
AuthorsSA Papanicolopulos, and E Veveakis
JournalGranular Matter
Start Page197
Pagination197 - 204
Date Published06/2011

Based on micromechanical considerations at the level of grain contacts and taking into account the way in which kinematic and static quantities are introduced at grain surface and grain centre, we identify appropriate measures related to energy dissipation due to rolling and sliding between grains, within both a discrete and a Cosserat continuum description. This allows us, within the framework of Cosserat plasticity, to identify appropriate invariants and formulate simple forms of the respective yield surfaces. The resulting model is shown to be a multiple-yield-surface generalisation of the model by Mühlhaus and Vardoulakis (Géotechnique 37(3):271-283, 1987). By introducing separate and clearly identified rolling- and sliding-resistance parameters, the model allows for separate activation of the respective dissipative mechanisms. © 2011 Springer-Verlag.

Short TitleGranular Matter