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| | 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 stat... | | 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. | | 文摘来源 | | s Sliding contact of the ideal rough surface has been investigated by numerical method.The results obtained show that the friction coefficient has a little effect on the normal contact.The major conclusions are summarized as follows:1)Friction will make the asperity contact area increase,while the peak normal stress is on the contrary.2)The maximun separation of two surface is greater than that of zero friction . | | 以理想粗糙表面同刚性平面的滑动弹性接触为研究对象,通过对求解域及第一种Fredholm积分方程的离散求解,得出了不同摩擦系数下的接触参量,并与无摩擦时的数值解及经典Hertz解作了比较. | | 文摘来源 | |   |
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