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Article Dans Une Revue Physical Review Letters Année : 2016

Connecting local yield stresses with plastic activity in amorphous solids

Résumé

In model amorphous solids produced via differing quench protocols, a strong correlation is established between local yield stress measured by direct local probing of shear stress thresholds and the plastic rearrangements observed during remote loading in shear. This purely local measure shows a higher predictive power for identifying sites of plastic activity when compared with more conventional structural properties. Most importantly, the sites of low local yield stress thus defined are shown to be persistent, remaining predictive of deformation events even after fifty or more such plastic rearrangements. This direct and non-perturbative approach gives access to relevant transition pathways that control the stability of amorphous solids. Our results reinforce the relevance of modeling plasticity in amorphous solids based on a gradually evolving population of discrete and local zones pre-existing in the structure.
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Dates et versions

hal-01340710 , version 1 (01-07-2016)

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  • HAL Id : hal-01340710 , version 1

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Sylvain Patinet, Damien Vandembroucq, Michael L. Falk. Connecting local yield stresses with plastic activity in amorphous solids. Physical Review Letters, 2016. ⟨hal-01340710⟩
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