金属滑动接触的滑移线场理论之发展现状

Slip-line Field Analysis for Sliding Metallic Friction

本文综述介绍了金属滑动接触的滑移线场理论的基本原理及其发展现状。该理论以一个硬质楞在较软金属表面的滑动作为金属滑动摩擦的基本模式,用滑移线场分析方法考察了滑动过程中的应力和应变,导出了摩擦系数的计算公式,揭示了在粘着理论中被隔离开来的粘着与犁削之间的内在联系。试验结果与理论计算结果有较好的一致性。该理论还提出了非疲劳磨损与疲劳磨损的不同变形和断裂机制,揭示了Archard磨损系数与微凸体发生疲劳断裂的临界受荷周期数之间的定量关系。文章还对该理论的进步意义及其发展趋势作了简要的评述。

The basic principle and current state of slip-line field theory for sliding metallic contact friction were introduced in this paper. The deformation of soft metal asperity caused by hard edge sliding, which was used as the basic model of sliding metallic contact friction. The involved strain and stress were analyzed and equations were derived for coefficient of friction. The study revealed that the interaction between adhesion and ploughing items, which were separated in the adhesion theory. Experimental results are in good agreement with the theoretically predicted results. The relationship between Archard' s wear coefficient and the critical number of deformation cycles to fatigue failure was estabished quantitatively. The significance and future trends of the study are also reviewed.