On the contact problem of soft-rigid interfaces: incorporation of Mindlin-Deresiewicz and self-deformation concepts

作者：Tian, Yu; Senetakis, Kostas^*

来源：GRANULAR MATTER, 2022, 24(1): 28.

DOI：10.1007/s10035-021-01186-3

• Constitutive modeling
• Composite interface
• Micromechanics
• Friction
• Tangential stiffness
• Microslip displacement

The contact problem of soft-rigid interfaces is investigated in this study performing micromechanical-based experiments on sand (rigid) grains sliding against granulated (soft) rubber and by incorporating the Mindlin-Deresiewicz model. The analysis suggested that modifications of the theoretical model are necessary by taking into account, quantitatively, the deformable nature of the soft particles in terms of self-deformations during sliding. Interface friction, tangential stiffness and microslip displacement are analyzed and an attempt is made to provide inter-correlations among different contact parameters, incorporating experimental stiffness and realistic displacement thresholds into the theoretical model.