中文摘要：

建立了汽车摩擦材料在摩擦过程中摩擦层形成的变时间步长的二维和三维元胞自动机模型,模拟了磨屑运动的变化状态与摩擦材料的表面形貌。用二维元胞自动机模型模拟了无磨损条件下摩擦材料表面的摩擦层的形成过程,可以得到磨屑沿摩擦力方向运动并聚集的图像。用三维元胞自动机模型模拟了有磨损时摩擦材料表面的摩擦层的形成过程,可以得到摩擦材料在不同厚度的磨屑运动和聚集的动态图像。通过元胞自动机模拟可以确定摩擦层形成的机制与磨屑的运动和受阻于钢纤维、陶瓷纤维或磨粒并聚集有关,也证明了在摩擦层的研究中元胞自动机法是一个理想的模拟方法。

英文摘要：

The motion mode of the debris and the formation of a friction layer on the surface of brake pads during friction have been established using the cellular automata （CA） method. Under conditions of no wear,the movement of debris and the morphology of the friction layer can be obtained using a two-dimensional model. Under wear conditions,a three-dimensional CA model is required to simulate the movement of debris and the formation of the friction layer in brake pads of different thickness. The mechanism of formation of the friction layer caused by the movement and accumulation of the debris was confirmed by both two-and three-dimensional CA models,showing that the CA method is an ideal way to study friction layers.