Abstract：Here, a micro convex body on rough surface was equivalent to a cone, combined with the fractal theory and the improved W-M function, the fractal model for normal contact stiffness of interface between two contact rough surfaces was established. Simulation calculations were done for the model. The results showed that the dimensionless normal contact load on interface increases with increase in dimensionless contact area, material plasticity index and dimensionless fractal roughness parameter; with increase in fractal dimension of rough surface, the dimensionless normal contact load firstly decreases and then increases, and reaches the minimum value when the fractal dimension is about 1.5; the dimensionless normal contact stiffness on interface increases with increase in dimensionless normal contact load and material plasticity index, and decreases with increase in dimensionless fractal roughness parameter; the dimensionless normal contact stiffness increases firstly and then decreases with increase in fractal dimension of rough surface, and reaches the maximum value when the fractal dimension is about 1.6; compared with test data, the correctness of the model is verified, the model can be applied in the related theoretical analysis and calculation.
兰国生，孙万，谭文兵，张学良，温淑花，陈永会. 基于圆锥微凸体的结合面法向刚度分形模型研究[J]. 振动与冲击, 2021, 40(15): 207-215.
LAN Guosheng, SUN Wan, TAN Wenbing, ZHANG Xueliang, WEN Shuhua, CHEN Yonghui. Cone elastoplastic fractal model of two contact rough surfaces. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(15): 207-215.
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