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Mechanism analysis and improved model for stick-slip friction behavior considering stress distribution variation of interface

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摘要 Studying the evolution of interface contact state, revealing the “black box” behavior in interface friction and establishing a more accurate friction model are of great significance to improve the prediction accuracy of mechanical system performance. Based on the principle of total reflection, a visual analysis technology of interface contact behavior is proposed. Considering the dynamic variation of stress distribution in interface contact, we analyze the nonlinear characteristics of contact parameters in different stages of stick-slip process using the above-mentioned experimental technology. Then,we find that the tangential stiffness of the interface is not a fixed value during the stick-slip process and the stress distribution variation is one of the important factors affecting the tangential stiffness of interface. Based on the previous experimental results, we present an improved stick-slip friction model, considering the change of tangential stiffness and friction coefficient caused by the stress distribution variation. This improved model can characterize the variation characteristics of contact parameters in different stages of stick-slip process, whose simulation results are in good agreement with the experimental data. This research may be valuable for improving the prediction accuracy of mechanical system performance.
作者 Jingyu Han Jiahao Ding Hongyu Wu Shaoze Yan 韩靖宇;丁甲豪;吴宏宇;阎绍泽(State Key Laboratory of Tribology,Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China)
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第3期350-363,共14页 中国物理B(英文版)
基金 Project supported by the National Natural Science Foundation of China (Grant No. 11872033) the Beijing Natural Science Foundation, China (Grant No. 3172017)。
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