Based on MB fractal model and its modified model, on the foundation of elastic and plastic regime, and considering the elastoplastic regime, an elastoplastic fractal model of normal contact stiffness of rough surfaces, which is continuous for critical contact parameters and considers the influence of domain extension factor, was proposed. Numerical simulation results show elastoplastic regime has an obvious effect on normal contact stiffness and dimensionless normal contact stiffness of elastoplastic fractal model is much more than that of only considering elastic and plastic regime; dimensionless normal contact stiffness increases with the increment of dimensionless normal load but the varying tendency is convex nonlinear(when fractal dimension D=1.1~1.4) or near linear(when fractal dimension D=1.4~1.9), increases(when fractal dimension D=1.1~1.5) or decreases(when fractal dimension D=1.5~1.9) with the increment of fractal dimension, decreases with the increment of fractal roughness, and increases with the increment of plastic index.
王南山;张学良;兰国生;温淑花;陈永会;刘丽琴;牛作证. 临界接触参数连续的粗糙表面法向接触刚度弹塑性分形模型[J]. , 2014, 33(9): 72-77.
Zhang Xue-liang Wang Nan-shan Lan Guo-sheng Wen Shu-hua Liu Li-qing Niu Zuo-zheng. Critical Contact Parameters Continuous for Elastoplastic Fractal Model of Normal Contact stiffness of Rough Surfaces . , 2014, 33(9): 72-77.