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Title: Effect of adhesive interaction on strain stiffening and dissipation in granular gels undergoing yielding
Authors: Chattopadhyay, Sebanti
Nagaraja, Sharadhi
Majumdar, Sayantan
Keywords: Soft Condensed Matter
Issue Date: 26-May-2022
Publisher: Communications Physics
Citation: Communications Physics, 2022. Vol. 5, Article No.126.
Abstract: Shear induced yielding in disordered solids, characterized by irreversibility and enhanced dissipation, is important for a wide range of industrial and geological processes. Although such phenomena in thermal systems have been extensively studied, they remain poorly understood for granular solids. Here, using oscillatory shear rheology we study energy dissipation in a disordered solid formed by dense granular suspensions of adhesive frictional particles. We find non-linear flow regimes showing intra-cycle strain stiffening and plasticity that strongly depend on both the applied strain amplitude and particle volume fraction, which can be captured by the normalized energy dissipation. Furthermore, in-situ optical imaging reveals irreversible particle rearrangements correlating with the spatio-temporal fluctuations in local velocity across the yielding transition. By directly measuring the critical jamming packing fraction using particle settling experiments, we propose a phase diagram that unravels the effect of inter-particle interactions on flow properties of the system for a large parameter space.
Description: Open Access
ISSN: 2399-3650 (Online)
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Copyright: 2022 The Author(s)
Appears in Collections:Research Papers (SCM)

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