Dipole screening in pure shear strain protocols of amorphous solids

Chandana Mondal, Michael Moshe, Itamar Procaccia, Saikat Roy

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

When amorphous solids are subjected to simple or pure strain, they exhibit elastic increase in stress, punctuated by plastic events that become denser (in strain) upon increasing the system size. It is customary to assume in theoretical models that the stress released in each plastic event is redistributed according to the linear Eshelby kernel, causing avalanches of additional stress release. Here we demonstrate that, contrary to the uniform affine strain resulting from simple or pure strain, each plastic event is associated with a nonuniform strain that gives rise to a displacement field that contains quadrupolar and dipolar charges that typically screen the linear elastic phenomenology and introduce anomalous length scales and influence the form of the stress redistribution. An important question that opens up is how to take this into account in elastoplastic models of shear induced phenomena like shear banding.

Original languageAmerican English
Article numberL042901
JournalPhysical Review E
Volume108
Issue number4
DOIs
StatePublished - Oct 2023

Bibliographical note

Publisher Copyright:
© 2023 American Physical Society.

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