Universality of the Plastic Instability in Strained Amorphous Solids

Details Universality of the Plastic Instability in Strained Amorphous Solids Universality of the Plastic Instability in Strained Amorphous Solids

2011-11-03

arxiv.org/abs/1111.0823v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

By comparing the response to external strains in metallic glasses and in Lenard-Jones glasses we find a quantitative universality of the fundamental plastic instabilities in the athermal, quasistatic limit. Microscopically these two types of glasses are as different as one can imagine, the latter being determined by binary interactions, whereas the former by multiple interactions due to the effect of the electron gas that cannot be disregarded. In spite of this enormous difference the plastic instability is the same saddle-node bifurcation. As a result the statistics of stress and energy drops in the elasto-plastic steady state are universal, sharing the same system-size exponents.

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