Particle dynamics predicts shear rheology of soft particle glasses

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dc.creatorKhabaz, Fardin
dc.creatorCloitre, Michel
dc.creatorBonnecaze, Roger T.
dc.date.accessioned2024-01-19T18:54:56Z
dc.date.available2024-01-19T18:54:56Z
dc.date.issued2020-03-01
dc.description.abstractSoft particle glasses are amorphous materials made of soft and deformable particles that are jammed above close-packing. They behave like weak solids at rest, but they yield and flow under external mechanical constraints. Although soft particle glasses are widely used in applica- tions, little is known about how the particle softness and microscopic dynamics determine the macroscopic rheology. Here, we use three- dimensional particle dynamic simulations to analyze the dynamical properties of soft particle glasses at different scales. We demonstrate how the dynamics is determined by the persistence time and the magnitude of the fluctuating elastic forces that develop at contact in the flow. The shear-induced diffusion coefficient, the local structural relaxation times, the shear stress, and the normal stress differences are interconnected through simple relationships that allow the prediction of the macroscopic rheology from the microscopic dynamics.
dc.description.departmentCenter for Dynamics and Control of Materials
dc.description.sponsorshipF.K. and R.T.B. gratefully acknowledge financial support from the National Science Foundation (NSF) (MRSEC under Award No. DMR-1720595)
dc.identifier.citationKhabaz, F; Cloitre, M; Bonnecaze, RT. Particle dynamics predicts shear rheology of soft particle glasses. J. Rheol. 2020, 64(2), 459-468. DOI: 10.1122/1.5129671.
dc.identifier.doiDOI: 10.1122/1.5129671.
dc.identifier.urihttps://hdl.handle.net/2152/123444
dc.identifier.urihttps://doi.org/10.26153/tsw/50240
dc.language.isoen_US
dc.relation.ispartofCenter for Dynamics and Control of Materials Publications
dc.rights.restrictionOpen
dc.subjectrheology
dc.titleParticle dynamics predicts shear rheology of soft particle glasses
dc.typeArticle

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