Metastability as a Mechanism for Yielding in Amorphous Solids under Cyclic Shear.
Phys Rev Lett
; 127(24): 248002, 2021 Dec 10.
Article
em En
| MEDLINE
| ID: mdl-34951789
ABSTRACT
We consider the yielding behavior of amorphous solids under cyclic shear deformation and show that it can be mapped into a random walk in a confining potential with an absorbing boundary. The resulting dynamics is governed by the first passage time into the absorbing state and suffices to capture the essential qualitative features recently observed in atomistic simulations of amorphous solids. Our results provide insight into the mechanism underlying yielding and its robustness. When the possibility of activated escape from absorbing states is added, it leads to a unique determination of a threshold energy and yield strain, suggesting thereby an appealing approach to understanding fatigue failure.
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Base de dados:
MEDLINE
Tipo de estudo:
Qualitative_research
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article