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Residual stress distributions in amorphous solids from atomistic simulations
Céline Ruscher1, Jörg Rottler2
1Institut Charles Sadron, 23 rue du Loess, F-67034 Strasbourg, France. celine.ruscher@ics-cnrs.unistra.fr and Department of Physics and Astronomy and Quantum Matter Institute, University of British Columbia, Vancouver, BC V6T 1Z1, Canada. jrottler@physics.ubc.ca.
Soft Matter
|September 9, 2020
Summary
Local residual stresses in amorphous solids dictate plastic flow. Deformation causes a system-size dependent plateau, suggesting local yield stress changes even without direct plastic activity.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Computational Materials Science
Background:
- Athermal amorphous solids exhibit complex plastic flow behavior.
- Understanding local residual stresses is key to predicting macroscopic properties.
Purpose of the Study:
- To investigate the distribution of local residual stresses in amorphous solids.
- To correlate stress distributions with plastic flow and yielding statistics.
Main Methods:
- Atomistic simulations were employed to model amorphous solids.
- Analysis focused on the distribution of local residual stresses during deformation.
Main Results:
- Quiescent configurations show a power-law distribution of local residual stresses.
- Deformation induces a system-size dependent plateau in stress distribution.
- Local yield stress can be altered even in regions not undergoing plastic deformation.
Conclusions:
- The study reveals the critical role of local residual stress distribution in amorphous solid plasticity.
- Deformation dynamics significantly alter stress landscapes, impacting material behavior.
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