Elastic-plastic-brittle transitions and avalanches in disordered media

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Abstract

A spring lattice model with the ability to simulate elastic-plastic-brittle transitions in a disordered medium is presented. The model is based on bilinear constitutive law defined at the spring level and power-law-type disorder introduced in the yield and failure limits of the springs. The key parameters of the proposed model effectively control the disorder distribution, significantly affecting the stress-strain response, the damage accumulation process, and the fracture surfaces. The model demonstrates a plastic strain avalanche behavior for perfectly plastic as well as hardening materials with a power-law distribution, in agreement with the experiments and related models. The strength of the model is in its generality and ability to interpolate between elastic-plastic hardening and elastic-brittle transitions.

Original languageEnglish (US)
Article number045503
JournalPhysical review letters
Volume112
Issue number4
DOIs
StatePublished - Jan 28 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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