Macroscopic friction laws and shear yielding of glassy solids

Publication Type
Journal Article
Year of Publication
2005
Authors
Rottler, Jörg
Robbins, Mark O.
Name of Publication
Computer Physics Communications
Volume
169
Pagination
177–182
Date Published
jul
ISSN
0010-4655
Keywords
amorphous, Friction, Shear, Yield
Abstract

Molecular simulations of yield in models of glassy polymers and amorphous metals are used to test classic yield criteria. Bulk systems follow the pressure-modified von Mises criterion, which is based on an isotropic, energy-driven model of yield. Thin films follow the {Mohr–Coulomb} criterion, which is based on an anisotropic friction model. The difference in behavior is correlated with a change in shear mechanism, and the connection between thin film results and macroscopic friction laws is discussed.