Influence of Thin Water Film on Skid Resistance

• 作者: Minh-Tan Do Veronique Cerezo Yannick Beautru Malal Kane
• 来源期刊: 交通与运输工程：英文版
• 学科: 交通运输
• 关键词: SKID resistance water depth microtexture.
• 年，卷（期）: 2014,（1）
• 页码范围: 36-44
• 页数: 9页
• 分类号: U

摘要

Most of past researches on the skid resistance/road wetness relationship deal with thick water depths （〉 1 mm）. Questions remain as to the variation of skid resistance with thin water films and the transition between the dry state and the so-called ＂damp＂ or ＂humid＂ state at which the skid resistance drop can be as high as 30%-40%. This paper deals with a theoretical and experimental assessment of the friction-water depth relationship. The main objective is to estimate local water depths trapped between the tire and the road asperities and to define a so-called ＂critical＂ water depth which can be used to detect risky situations for road users. Tests are performed in laboratory. It was found that the friction-water depth curves have an inverse-S shape and present an initial constant-friction part before decreasing to a minimum value. A ＂critical＂ water depth, defined as the water depth above which the friction coefficient collapses significantly, is determined from surface texture on critical water depth is discussed. observed friction-water depth curves. Influence of test speed and road