Percolating Plastic Failure as a Mechanism for Shear Softening in Amorphous Solids
Soft Condensed Matter
2013-12-17 v1 Materials Science
Abstract
``Shear softening" refers to the observed reduction in shear modulus when the stress on an amorphous solid is increased beyond the initial linear region. Careful numerical quasi-static simulations reveal an intimate relation between plastic failure and shear softening. The attaintment of the steady-state value of the shear modulus associated with plastic flow is identified with a percolation of the regions that underwent a plastic event. We present an elementary ``two-state" model that interpolates between failed and virgin regions and provides a simple and effective characterization of the shear softening.
Keywords
Cite
@article{arxiv.1312.4136,
title = {Percolating Plastic Failure as a Mechanism for Shear Softening in Amorphous Solids},
author = {Vijayakumar Chikkadi and Oleg Gendelman and Valery Ilyin and J Ashwin and Itamar Procaccia},
journal= {arXiv preprint arXiv:1312.4136},
year = {2013}
}