【作者】 赵永春；

【导师】 刘焜；

【作者基本信息】 合肥工业大学 ， 机械设计及理论， 2009， 硕士

【摘要】 表面形貌是指零件在加工过程中因诸多因素综合作用而残留于零件表面的粗糙度、波度、形状误差及纹理等各种不同形状和尺寸的微观几何形态。摩擦过程中表面形貌动态变化过程的描述,是进一步深入研究表面形貌摩擦学效应的基础。本文根据脆性材料和塑性材料的特点,针对摩擦过程中的表面形貌相互作用问题,基于离散元原理,并利用该原理的一种应用程序——PFC程序,直观地对表面形貌相互作用过程进行了模拟。模拟结果表明在刚性光滑平面与理想粗糙表面相互作用之后,粗糙度变小,表面结构也发生较大变化。并且随着两个接触表面法向接近量的增大,粗糙表面的脱落颗粒数增加,磨损程度加剧。更多还原

【Abstract】 Surface topography is the micro-geometry morphology remained at the surface of machine elements, which consists of roughness, waveness and form errors and caused by various random factors during machining. Description of the dynamic variations of surface topography in the friction progress is the basis for the research of tribological effects of surface topography. In this paper, according to the characteristics of brittle material and plastic material, the interaction mechanism of the surface topographys in the friction process is studied based on the principle of discrete element method. The Particle Flow Code program (or PFC program) is employed to simulate the interaction process of contacting surface topographys and digital descriptions of dynamic variations of the surface are given. Simulation results show that the roughness of surface become smaller after the interaction between rigid smooth surface and the ideal rough surface, and the surface structure changes. With the increase of normal approaching of the two contacting surfaces, the number of detached particles from the rough surface increases, indicating that the degree of wear between contacting surfaces increases.更多还原