中国物理B ›› 2022, Vol. 31 ›› Issue (3): 34601-034601.doi: 10.1088/1674-1056/ac1931

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

Jingyu Han(韩靖宇), Jiahao Ding(丁甲豪), Hongyu Wu(吴宏宇), and Shaoze Yan(阎绍泽)   

  1. State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
  • 收稿日期:2021-06-08 修回日期:2021-07-12 接受日期:2021-07-30 出版日期:2022-02-22 发布日期:2022-02-14
  • 通讯作者: Shaoze Yan E-mail:yansz@mail.tsinghua.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11872033) and the Beijing Natural Science Foundation, China (Grant No. 3172017).

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

Jingyu Han(韩靖宇), Jiahao Ding(丁甲豪), Hongyu Wu(吴宏宇), and Shaoze Yan(阎绍泽)   

  1. State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2021-06-08 Revised:2021-07-12 Accepted:2021-07-30 Online:2022-02-22 Published:2022-02-14
  • Contact: Shaoze Yan E-mail:yansz@mail.tsinghua.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11872033) and the Beijing Natural Science Foundation, China (Grant No. 3172017).

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.

关键词: stress distribution, tangential stiffness, friction coefficient, stick-slip, friction model

Abstract: 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.

Key words: stress distribution, tangential stiffness, friction coefficient, stick-slip, friction model

中图分类号:  (Tribology and mechanical contacts)

  • 46.55.+d
42.30.Va (Image forming and processing) 78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))