ArticleNature communications2024
From creep to flow: Granular materials under cyclic shear.
Article in Nature communications, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Dynamic heterogeneity and hidden fluidity in dense epithelial tissues.Science advances · 2026Article
- Friction-controlled reentrant aging and fluidization in granular materials.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Mesoscale avalanche size underpins the rheology of granular yielding.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Metastable state preceding shear zone instability: Implications for earthquake-accelerated landslides and dynamic triggering.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
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Authors and funding
7 authors.
Funding
Abstract
When unperturbed, granular materials form stable structures that resemble the ones of other amorphous solids like metallic or colloidal glasses. Whether or not granular materials under shear have an elastic response is not known, and also the influence of particle surface roughness on the yielding transition has so far remained elusive. Here we use X-ray tomography to determine the three-dimensional microscopic dynamics of two granular systems that have different roughness and that are driven by cyclic shear. Both systems, and for all shear amplitudes Γ considered, show a cross-over from creep to diffusive dynamics, indicating that rough granular materials have no elastic response and always yield, in stark contrast to simple glasses. For the system with small roughness, we observe a clear dynamic change at Γ ≈ 0.1, accompanied by a pronounced slowing down and dynamical heterogeneity. For the large roughness system, the dynamics evolves instead continuously as a function of Γ. We rationalize this roughness dependence using the potential energy landscape of the systems: The roughness induces to this landscape a micro-corrugation with a new length scale, whose ratio over the particle size is the relevant parameter. Our results reveal the unexpected richness in relaxation mechanisms for real granular materials.
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Registered trials
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