Coarse-graining amorphous plasticity: impact of rejuvenation and disorder
The coarse-graining of amorphous plasticity from the atomistic to the mesoscopic scale is studied in the framework of a simple scalar elasto-plastic model. Building on recent results obtained on the atomistic scale, we discuss the interest of a disordered landscape-informed threshold disorder to rep...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Académie des sciences
2023-06-01
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| Series: | Comptes Rendus. Physique |
| Subjects: | |
| Online Access: | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.156/ |
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| Summary: | The coarse-graining of amorphous plasticity from the atomistic to the mesoscopic scale is studied in the framework of a simple scalar elasto-plastic model. Building on recent results obtained on the atomistic scale, we discuss the interest of a disordered landscape-informed threshold disorder to reproduce the physics of amorphous plasticity. We develop a rejuvenation scenario that reproduces quasi-quantitatively the evolution of the mean local yield stress and the localization behavior. We emphasize the crucial role of two dimensionless parameters: the relative strength of the yield stress disorder with respect to the typical stress drops associated with a plastic rearrangement, and the age parameter characterizing the relative stability of the initial glass with respect to the rejuvenated glass that emerges upon shear deformation. |
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| ISSN: | 1878-1535 |