 |
Journal articles
Mapping between atomistic simulations and Eshelby inclusions in the shear deformation of an amorphous silicon model
Abstract : In this paper we perform quasistatic shear simulations of model amorphous silicon bulk samples with Stillinger-Weber-type potentials. Local plastic rearrangements identified based on local energy variations are fitted through their displacement fields on collections of Eshelby spherical inclusions, allowing determination of their transformation strain tensors. The latter are then used to quantitatively reproduce atomistic stress-strain curves, in terms of both shear and pressure components. We demonstrate that our methodology is able to capture the plastic behavior predicted by different Stillinger-Weber potentials, in particular, their different shear tension coupling. These calculations justify the decomposition of plasticity into shear transformations used so far in mesoscale models and provide atomic-scale parameters that can be used to limit the empiricism needed in such models up to now.
Cited literature [46 references]
https://hal-univ-lyon1.archives-ouvertes.fr/hal-02304939
Contributor : Depot 4 Lyon 1 <>
Submitted on : Tuesday, July 14, 2020 - 12:36:04 AM
Last modification on : Thursday, October 15, 2020 - 8:54:04 AM
Contributor : Depot 4 Lyon 1 <>
Submitted on : Tuesday, July 14, 2020 - 12:36:04 AM
Last modification on : Thursday, October 15, 2020 - 8:54:04 AM
File
albaret2016.pdf
Publisher files allowed on an open archive