Relations between the Material Mechanical Parameters and the Inter-particle Potential in Amorphous Solids

Details Relations between the Material Mechanical Parameters and the Inter-particle Potential in Amorphous Solids Relations between the Material Mechanical Parameters and the Inter-particle Potential in Amorphous Solids

2009-02-26

arxiv.org/abs/0902.4516v1

Physics

Condensed Matter

Materials Science

4 pages, 7 figures

Scientific paper

The shear-modulus and yield-stress of amorphous solids are important material parameters, with the former determining the rate of increase of stress under external strain and the latter being the stress value at which the material flows in a plastic manner. It is therefore important to understand how these parameters can be related to the inter-particle potential. Here a scaling theory is presented such that given the inter-particle potential, the dependence of the yield stress and the shear modulus on the density of the solid can be predicted in the athermal limit. It is explained when such prediction is possible at all densities and when it is only applicable at high densities. These results open up exciting possibilities for designing in principle new materials with desirable mechanical properties.

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