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Analysis of factors influencing the friction coefficients of shoe sole materials

机译：鞋底材料摩擦系数的影响因素分析

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摘要

The slip resistance of pedestrian surfaces is usually characterized by friction coefficients measured with samples of shoe sole materials. The factors that influence the results of friction measurements were investigated for two elastomer materials and leather using the portable tribometer Floor Slide Control 2000, which was operated under varying conditions in a climate chamber on two reference surfaces. The friction behaviour observed was in accordance with viscoelastic material properties and depended on the softness of the shoe sole materials. Temperature and mechanical abrasion of the sole materials during the measurements were the factors with the greatest systematic effects on the dynamic coefficients of friction. In some cases, the coefficients of friction also depended on the direction in which a test material was slid along the same track, indicating an influence of local floor surface variations. For dry leather, the influence of relative air humidity on the measured friction coefficients strongly depended on the floor surface. Due to varying systematic influences, the standard deviations of the friction coefficients in series of 20 repetitive measurements (repeatability standard deviation) differed for the individual material combinations. Linear regression analysis of the data revealed that pure random contributions to the repeatability standard deviation were similar and around 0.005 for all investigated materials.
机译：行人表面的防滑性通常以鞋底材料样品测得的摩擦系数为特征。使用便携式摩擦计Floor Slide Control 2000研究了两种弹性体材料和皮革的影响摩擦测量结果的因素，该便携式摩擦计Floor Slide Control 2000在气候条件不同的条件下在两个参考表面上运行。观察到的摩擦行为与粘弹性材料的性质有关，并取决于鞋底材料的柔软性。在测量过程中，鞋底材料的温度和机械磨损是对动态摩擦系数影响最大的因素。在某些情况下，摩擦系数还取决于测试材料沿同一轨道滑动的方向，这表明了局部地板表面变化的影响。对于干革，相对空气湿度对测得的摩擦系数的影响很大程度上取决于地板表面。由于变化的系统影响，在每种材料组合中，一系列20次重复测量的摩擦系数的标准偏差（可重复性标准偏差）有所不同。数据的线性回归分析表明，对所有可重复使用的材料，纯随机性对重复性标准偏差的贡献均相似，约为0.005。

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