理想粗糙表面的弹性全接触研究  

On The Elastic Conformity Contact of Ideal Rough Surfaces

作　　者：杨桂萍[1] 冷永胜[1] 

机构地区：[1]北方工业大学建筑学院,北京石景山100041

出　　处：《北方工业大学学报》1998年第3期47-52,共6页Journal of North China University of Technology

基　　金：国家自然科学基金

摘　　要：在边界润滑（两个固体表面之间仅被一层物理或化学吸附膜隔开）条件下，两个粗糙表面发生滑动接触时，真实接触面积Ar通常远小于名义接触面积An.但对于σ／β*值（σ为表面粗糙度均方根值，β*为自相关长度）较小的平缓表面．真实接触率Ar／An会很大，甚至发生全接触．这种情况易使表面发生粘着破坏［1，2］．根据Sayles的滑动状态图以及理想粗糙表面接触力学模型［3］，考察粗糙表面发生全接触的条件，给出在确定载荷下粗糙表面安全滑动接触时，表面斜率均方根值σm的变化范围．将研究结果同Sayles［4］和Johnson［5］的工作进行比较，提出了表面全接触判据，由此来预测真实粗糙表面的接触状态．In boundary lubrication and sliding contact conditions (where two solid surfaces are separated by a physically or chemically adsorbed film), the real contact area of rough surfaces is usually far less than the nominal contact area. However, for 'smooth' surfaces with small values of σ/β. (where σ is the rms of surface roughness, and β. the auto-correlation length), the contact ratio can be large and conformity contact is liable to occur, resulting in the adhesive wear[1,2]. Based on the Sayles' sliding state map and the contact model of ideal rough surfaces[3], the authors investigate the conformity contact conditions, and give the values of the rms of surface slope for safe sliding at the given load. Our results are compared with those of Sayles' and Johnson' s, from which we proposed a criterion for the conformity contact to predict the sliding state of the real rough surfaces.

关 键 词：理想粗糙表面 弹性全接触 滑动接触状态 

分 类 号：O343.3[理学—固体力学]