Friction Coefficient Variation between Brake Pad and Disc Rotor with Moisture

ディスクブレーキの摩擦面に微少水分が介在する時の 摩擦係数の変動解析

This paper deals with the friction coefficient μ variation of a disc brake system with moisture. In the authors' previous studies, it was experimentally found that wet wear debris between the brake pad and the disc rotor affect μ variation and μ of the wet wear debris increases with decreasing their moisture content. Based on the experimental results, the authors propose a hypothesis that clusters composed of the wet wear debris induce μ variation when the clusters stand between friction surfaces. In this paper, for supporting the hypothesis, they tested the shear properties with different kinds of liquid, and simulated the wear debris behavior under wet condition between friction surfaces using the discrete element method. From these results, the authors clarified that the wet wear debris made the clusters due to the capillary force, and their behavior contributed the increase of μ.微少水分下における摩擦係数変動に対し,その要因を摩耗粉挙動に着目して推察した.水が介在すると摩耗粉同士が付着しクラスターを形成する仮説を立て,粉体の圧縮せん断実験や離散要素法を用いた数値計算を行った.その結果,摩耗粉の特性だけでなく,摩耗粉を囲む界面の特性も摩擦係数の変動に寄与することが確認できた.

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  • English
  • Japanese

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  • Accession Number: 01666777
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Jan 31 2018 3:18PM