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Research Article | Open Access

Relationship between contact size and static friction: An approach for rigid crystalline surfaces

Hao CHENXinlei GAO()
School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China
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Abstract

Relationship between contact size (A) and static friction (f) has been studied for rigid crystalline systems. We built a series of systems with two identical surfaces but different orientations and investigated the effects of the size and shape of the contact area on static friction. In these systems, there are numerous nontrivial commensurate contacts. Our results confirmed that the relationship between A and f was determined by both commensurability and shape of the contact. For commensurate contacts, fA independent of the shape. For incommensurate contacts, generally fA0 for regular shapes or fA1/4 for irregular shapes; however, in very few cases of regular shapes, fA1/2. Moreover, in above systems, commensurability of a contact can be easily changed by a perturbation of the misfit angle. Therefore, if the perturbation caused by the lateral force and the deformation of the surface are considered (as is the case in real systems), further research is necessary.

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Friction
Pages 502-512
Cite this article:
CHEN H, GAO X. Relationship between contact size and static friction: An approach for rigid crystalline surfaces. Friction, 2021, 9(3): 502-512. https://doi.org/10.1007/s40544-019-0352-9
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