Study on Friction Behaviors of Soft Materials Considering Sliding-Caused Deformation

Author:

Wei Huixin1ORCID,Wang Shibin1,Li Chuanwei1,Wang Zhiyong1,Sun Xin1,Sun Cuiru1,Li Linan1,Huo Zongze1

Affiliation:

1. Department of Mechanics, Tianjin University, Tianjin 300350, P. R. China

Abstract

Accurate and quantitative characterization of friction behavior is of critical importance for material design and manufacture, especially for soft materials. It is mainly because the sliding-caused deformation of soft materials has always been neglected during characterization. Here, a modified model considering sliding-caused deformation was proposed to characterize the friction behavior between a spherical glass indenter and silicon rubber. A novel friction apparatus consisting of a transparent spherical indenter connected with a camera was used in real-time to measure the friction contact status. The contact shape and area during friction were then extracted by a proposed shape function. Experimental results show that shrinking and expanding of the contact area occur simultaneously when a spherical-rigid indenter slides on a soft substrate due to sliding-caused deformation of soft materials. Based on these results, this study built a modified model considering the shape change and the accompanying deformation component of friction, which is an effective method for evaluating the friction behavior of soft materials.

Funder

National Natural Science Foundation of China

Tianjin Science and Technology Planning Projects

Publisher

World Scientific Pub Co Pte Ltd

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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