Beyond linear elasticity: Jammed solids at finite shear strain and rate

Julia Boschän, Daniel Vagberg, Ellák Somfai, Brian P. Tighe

Research output: Contribution to journalArticleScientificpeer-review

24 Citations (Scopus)
20 Downloads (Pure)

Abstract

The shear response of soft solids can be modeled with linear elasticity, provided the forcing is slow and weak. Both of these approximations must break down when the material loses rigidity, such as in foams and emulsions at their (un)jamming point-suggesting that the window of linear elastic response near jamming is exceedingly narrow. Yet precisely when and how this breakdown occurs remains unclear. To answer these questions, we perform computer simulations of stress relaxation and shear start-up tests in athermal soft sphere packings, the canonical model for jamming. By systematically varying the strain amplitude, strain rate, distance to jamming, and system size, we identify characteristic strain and time scales that quantify how and when the window of linear elasticity closes, and relate these scales to changes in the microscopic contact network.

Original languageEnglish
Pages (from-to)5450-5460
JournalSoft Matter
Volume12
Issue number24
DOIs
Publication statusPublished - 2016

Bibliographical note

Accepted Author Manuscript

Fingerprint

Dive into the research topics of 'Beyond linear elasticity: Jammed solids at finite shear strain and rate'. Together they form a unique fingerprint.

Cite this