Farhang Radjai : Fabric and force anisotropy in cohesive granular materials
The cohesive strength of granular materials is a consequence of either cohesive bonding (capillary bridging, van der Waals forces) between the grains or the action of a binding solid or liquid material in the pore space. I first discuss the constitutive framework of the plastic behavior of granular materials with internal variables pertaining to the granular fabric. Then, I show how cohesive granular systems can be simulated by different methods accounting for capillary or solid bonding and in the presence of a binding solid or liquid. Finally, I focus on two issues: (1) How does local granular disorder affects the scale-up of cohesive interactions? (2) What are the respective roles of adhesion and volume fraction in the case of binding materials?
- Category: Nonlinear and Complex Systems
- Duration: 14:47
- Date: April 7, 2015 at 2:45 PM
- Views: 179
- Tags: seminar, CNCS Seminar
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