Development of Anti-skid Shoe Sole on Lubricated Smooth Surface by Use of Hybrid Tread Pattern
This paper describes the development of a new shoe sole pattern by use of the rectangular rubber block combining smooth and rough surfaces, which shows high static and high kinetic friction coefficients on a lubricated smooth surface. The hybrid rectangular rubber block in which the rectangular rubber block with a rough surface (Ra=30.4 μm) was sandwiched between two rectangular rubber blocks with a smooth surface (Ra=0.98 μm) was prepared. The ratio of the rough surface area to the whole rubber block surface r was 0, 30, 50, 60, 70, 80, 90, and 100％. The rubber block was slid against a smooth stainless steel (JIS SUS304) plate with Ra of 0.09 μm lubricated with 90％ aqueous solution of glycerol. The static friction coefficient increased with an increase of the rough surface area ratio r. On the other hand, the steady-state kinetic friction coefficient decreased with an increase of the rough surface area ratio r. The rough surface area ratios of 50％ and 60％ achieved high static friction coefficients of 0.5 or more and high kinetic friction coefficients greater than 0.5 on a lubricated smooth stainless steel surface. Through the observation of contact interface using total reflection of light and the analysis of the contact area ratio between the rubber block and the smooth glass plate (Ra=0.004 μm) under glycerol solution lubricated condition, it was indicated that such high static and kinetic friction coefficients for the hybrid rectangular rubber block would be provided by large contact area both at the slip initiation and the steady-state sliding.
Takeshi Yamaguchi Tomoki Umetsu Yusuke Ishizuka Kenichi Kasuga Takayuki Ito Satoru Ishizawa Kazuo Hokkirigawa
Graduate School of Engineering, Tohoku University, Japan Kohshin Rubber Co., Ltd., Japan
国际会议
17th World Congress on Ergonomics(第十七届国际人类工效学大会)
北京
英文
1-9
2009-08-09（万方平台首次上网日期，不代表论文的发表时间）