Wall effects on spatial correlations of non-affine strain in a 3D model glass

Abstract

Effects of hard planar walls with a particle scale roughness on the spatial correlations of non-affine strain in amorphous solids are investigated via molecular dynamics simulations. When determined within layers parallel to the wall plane, normalized non-affine strain correlations are enhanced within layers closer to the wall. The amplitude of these correlations, on the other hand, is found to be suppressed by the wall. While the former is connected to the effects of a hard boundary on the continuum mechanics scale, the latter is attributed to molecular scale wall effects on the size of the region (nearest neighbor cage), explored by particles on intermediate times scales.

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• Probing the degree of heterogeneity within a shear band of a model glass
• Deformation and flow of amorphous solids: An updated review of mesoscale elastoplastic models
• Long-range strain correlations in 3D quiescent glass forming liquids
• A crossover in spatio-temporal correlations of strain fluctuations in glass forming liquids