Orientation of plastic rearrangements in two-dimensional model glasses under shear
arXiv:1802.04035 · doi:10.1103/PhysRevE.97.063002
Abstract
The plastic deformation of amorphous solids is mediated by localized shear transformations involving small groups of particles rearranging irreversibly in an elastic background. We introduce and compare three different computational methods to extract the size and orientation of these shear transformations in simulations of a two-dimensional (2D) athermal model glass under simple shear. We find that the shear angles are broadly distributed around the macroscopic shear direction, with a more or less Gaussian distribution with a standard deviation of around 20 about the direction of maximal local shear. The distributions of sizes and orientations of shear transformations display no substantial sensitivity to the shear rate. These results can notably be used to refine the description of rearrangements in elastoplastic models.
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- Deformation and flow of amorphous solids: An updated review of mesoscale elastoplastic models
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- Elementary processes in dilatational plasticity of glasses
- Particle-scale origin of quadrupolar non-affine displacement fields in granular solids
- Dynamic phase diagram of plastically deformed amorphous solids at finite temperature
- Yielding in dense active matter