Static and dynamic friction of hierarchical surfaces

Abstract

Hierarchical structures are very common in Nature, but only recently have they been systematically studied in materials physics, in order to understand the specific effects they can have on the mechanical properties of various systems. Structural hierarchy provides a way to tune and optimize macroscopic mechanical properties starting from simple base constituents, and new materials are nowadays designed exploiting this possibility. This can be also true in the field of tribology. In this paper, we study the effect of hierarchical patterned surfaces on the static and dynamic friction coefficients of an elastic material. Our results are obtained by means of numerical simulations using a 1-D spring-block model, which has previously been used to investigate various aspects of friction. Despite the simplicity of the model, we highlight some possible mechanisms that explain how hierarchical structures can significantly modify the friction coefficients of a material, providing a means to achieve tunability.

arXiv comment11 pages, 13 figures

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Cited by in corpus (12)

• Hierarchical auxetic and isotropic porous medium with extremely negative Poisson's ratio
• A 2-D Model for friction of complex anisotropic surfaces
• Avalanche precursors of failure in hierarchical fuse networks
• Tuning friction with composite hierarchical surfaces
• Static Friction Coefficient Depends on the External Pressure and Block Shape due to Precursor Slip
• Correlation between slip precursors and topological length scales at the onset of frictional sliding
• Nucleation and propagation of excitation fronts in self-excited systems
• Experimental and numerical study of the effect of surface patterning on the frictional properties of polymer surfaces
• Emergence of the interplay between hierarchy and contact splitting in biological adhesion highlighted through a hierarchical shear lag model
• Graph theoretical approaches for the characterization of damage in hierarchical materials
• The impact of static distortion waves on superlubricity
• Control of Static Friction by Designing Grooves on Friction Surface