Chang W R
Liberty Mutual Research Center for Safety and Health, Hopkinton, MA 01748, USA.
Appl Ergon. 2001 Apr;32(2):173-84. doi: 10.1016/s0003-6870(00)00054-5.
Surface roughness affects friction, but it is not clear what surface roughness characteristics are better correlated with friction. The average of the maximum height above the mean line in each cut-off length (Rpm) and the arithmetical average of surface slope (deltaa) had the highest correlation with dynamic friction coefficient in a previous study. The previous study was expanded to two different footwear materials and four different contaminants on a porcelain tile in the current investigation. The results showed that dynamic friction decreased as the interface speed and glycerol content in the contaminant were increased due to the hydrodynamic lubrication effect. Deltaa had the highest correlation with friction for most of the test conditions with neolite. For Four S rubber, friction coefficient appeared to have the highest correlation with the parameters related to the surface void volume at 30% glycerol content, related to the surface slope at 70 and 85% glycerol contents, and related to the peak to valley distance at 99% glycerol content. A good indicator of surface slip resistance probably should consist of the surface parameters representing the surface slope, the surface void volume and the surface peak-to-valley distance with the coefficients determined by the system parameters.
表面粗糙度会影响摩擦力，但目前尚不清楚哪些表面粗糙度特征与摩擦力的相关性更强。在之前的一项研究中，每个截止长度内平均线以上的最大高度平均值（Rpm）和表面斜率的算术平均值（deltaa）与动摩擦系数的相关性最高。在当前的研究中，之前的研究扩展到了两种不同的鞋类材料以及瓷砖上的四种不同污染物。结果表明，由于流体动力润滑效应，随着界面速度和污染物中甘油含量的增加，动摩擦力会降低。在大多数使用氯丁橡胶的测试条件下，Deltaa与摩擦力的相关性最高。对于四丁基橡胶，在甘油含量为30%时，摩擦系数似乎与与表面空隙体积相关的参数相关性最高；在甘油含量为70%和85%时，与表面斜率相关；在甘油含量为99%时，与峰谷距离相关。一个良好的表面防滑指标可能应该由代表表面斜率、表面空隙体积和表面峰谷距离的表面参数组成，其系数由系统参数确定。
