两弹塑性接触粗糙表面的静密封流量

当峰高的概率密度为指数分布时,利用泰勒公式推导了弹性载荷的近似解析解,给出了塑性载荷的严格解析解,导出了静密封流量的经验表达式。通过密封表面的泄漏量与表高标准差的3次方成正比。在塑性接触状态,存在一个临界塑性指数,当塑性指数大于临界塑性指数时,总载荷与塑性指数、粗糙度参数皆无关,量纲一的塑性泄漏量与较软材料的硬度有关,与两接触粗糙表面的复合弹性模量无关。

Static sealing flow of two elastic-plastic contact rough surfaces

An approximate analytic solution for the elastic load was derived by applying Taylor equation when the asperity heights follow an exponential distribution. The exact analytic solution for the plastic load and empirical expression for the static sealing flow were deduced. The leakage past the sealing surfaces is proportional to the cubic standard deviation of surface height. There exists a certain critical plasticity index during plastic contact. The total load becomes independent of the plasticity index and...