金属材料表面静摩擦学特性的预测研究——理论模型

田红亮;赵春华;方子帆;朱大林;陈保家;李响

振动与冲击 ›› 2013, Vol. 32 ›› Issue (12) : 40-44.

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (12) : 40-44.
论文

金属材料表面静摩擦学特性的预测研究——理论模型

  • 田红亮1,赵春华1,方子帆1,朱大林1,陈保家2,李响2
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Predictable investigation on static tribological performance for metallic material surfaces—— theoretical part

  • TIAN Hong-liang1, ZHAO Chun-hua1, FANG Zi-fan1, ZHU Da-lin1, CHEN Bao-jia2, LI Xiang2
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摘要

对分形几何理论进行了改进,在此基础上建立了法向载荷、最大静摩擦力、静摩擦系数的改进分形模型。通过中间自变量实际接触面积,构建了金属材料结合面静摩擦学特性的预测模型。计算和分析表明:静摩擦系数随着法向载荷或材料特性的增大而微凹弧式增大,但随着分形粗糙度的增加而微凹弧式减小;当分形维数较小时,静摩擦系数随着分形维数的增加而增加;但当分形维数较大时,静摩擦系数随着分形维数的增加而减小;在双常用对数坐标系统下,最大静摩擦力与法向载荷大多呈现出线性正比的关系;分形几何理论适用于法向载荷极小的情况。

Abstract

The fractal geometric theory was modified. The improved fractal models for normal load, maximal static friction force and static friction coefficient were established using improved fractal geometric theory. According to the middle unknown variable of real contact area, the prediction model of static tribological performance for metallic material joint surface was given. The calculation and analysis above indicate that static friction coefficient micro concavely increases as normal load or material property increases, while it micro concavely decreases with increasing fractal roughness. When fractal dimension is smaller, the static friction coefficient increases as fractal dimension increases; however, when fractal dimension becomes larger, the static friction coefficient decreases as fractal dimension increases. The maximum static friction force mostly is linearly proportional to the normal load on a common logarithm reference frame. The fractal geometric theory could be applied under small normal load condition.

关键词

机械结合面 / 静摩擦系数 / 分形几何理论 / 最大静摩擦力

Key words

mechanical joint surface / static friction coefficient / fractal geometric theory / maximal static friction force

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田红亮;赵春华;方子帆;朱大林;陈保家;李响. 金属材料表面静摩擦学特性的预测研究——理论模型[J]. 振动与冲击, 2013, 32(12): 40-44
TIAN Hong-liang;ZHAO Chun-hua;FANG Zi-fan;ZHU Da-lin;CHEN Bao-jia;LI Xiang. Predictable investigation on static tribological performance for metallic material surfaces—— theoretical part[J]. Journal of Vibration and Shock, 2013, 32(12): 40-44

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