Fractal Model of Static Frictional Coefficient on Joint Surface Considering Elastic-plastic Deformation
Zhang Yin · Journal of Taiyuan University of Science and Technology · 2014
A three-dimensional fractal model of static frictional factor on joint interfaces was presented based on three-dimensional contact fractal theory with consideration of elastic,elastic-plastic and plastic deformation.The model reflected the influence of normal load,fractal dimension and fractal characteristics scaling parameters on static frictional factor of joint interfaces.The simulation results showed that the static frictional factor increased firstly,and then decreased with the increase of D,namely fractal dimension; increased with the increase of P*,namely dimensionless normal total load; and decreased with the increase of G*,namely fractal characteristics scaling parameters.Considering elastic-plastic deformation mechanism of joint surface static friction factor is less than without considering elastic-plastic deformation mechanism of joint surface static friction factor.