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From depinning transition to plastic yielding of amorphous media: A soft modes perspective

By Botond Tyukodi, Sylvain Patinet, Stéphane Roux and Damien Vandembroucq

Abstract

A mesoscopic model of amorphous plasticity is discussed in the context of depinning models. After embedding in a d + 1 dimensional space, where the accumulated plastic strain lives along the additional dimension, the gradual plastic deformation of amorphous media can be regarded as the motion of an elastic manifold in a disordered landscape. While the associated depinning transition leads to scaling properties, the quadrupolar Eshelby interactions at play in amorphous plasticity induce specific additional features like shear-banding and weak ergodicity breakdown. The latters are shown to be controlled by the existence of soft modes of the elastic interaction, the consequence of which is discussed in the context of depinning

Topics: Plastic Deformation, Glass, Yield Stress, Shear banding, Amorphous, Soft Mode, Ergodicity breaking, Depinning transition, [ PHYS.COND.CM-SCM ] Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], [ PHYS.MECA.MEMA ] Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph]
Publisher: HAL CCSD
Year: 2016
OAI identifier: oai:HAL:hal-01120846v2
Provided by: Hal-Diderot

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