Effects of Stress Distribution at the Contact Interface on Static Friction Force: Numerical Simulation and Model Experiment

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• 作者：Satoru Maegawa ; Fumihiro Itoigawa ; Takashi Nakamura
• 关键词：Static friction ; Static friction coefficient ; Friction mechanisms ; Tangential loading history
• 刊名：Tribology Letters
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：62
• 期：2
• 全文大小：2,361 KB
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• 作者单位：Satoru Maegawa (1) (2)
  Fumihiro Itoigawa (1)
  Takashi Nakamura (1)
  
  1. Department of Mechanical Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi, 466-8555, Japan
  2. Department of Mechanical and Aerospace Engineering, Tottori University, 4-101 Minami Koyama, Tottori, 680-8553, Japan
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Tribology, Corrosion and Coatings
  Surfaces and Interfaces and Thin Films
  Theoretical and Applied Mechanics
  Physical Chemistry
  Nanotechnology
  
• 出版者：Springer Netherlands
• ISSN：1573-2711

文摘

This study develops a simplified model that can simulate the dynamics of a split contact interface at the transition from static to kinetic friction. The model has a contact interface formed by multiple contacting points connected to a rigid base via a spring. From a numerical analysis of this model, the effect of the stress distribution at the contact interface on the level of static friction force was investigated. Consequently, it was found that the existence of the stop-restart motion can act to increase the macroscopic (apparent) static friction force. Thus, the numerical analysis demonstrated that the macroscopic static friction coefficient could be changed without varying the local static friction coefficient. The type of tangential loading history, i.e., the existence of stop-restart motion, is an important factor for characterizing the level of the static friction force. In other words, this implies that we can adjust the level of the macroscopic static friction coefficient without changes to the local static friction. Furthermore, the above numerical prediction was confirmed by a model experiment focusing on the sliding contact interface of an object built from separated rubber blocks.