Study on the Degradation Law of Artificial Joint Surfaces with Natural Morphologies under Quasi-Static Cyclic Shearing

In this paper, a series of quasi-static cyclic shear tests were performed on artificial rock joint specimens with natural morphologies at different normal stress levels. After shearing, combined 3D scanning technology and image processing, the morphology parameter, A0θmax∗/(C+1), 36 analyzed directions was measured to investigate damage degradation laws surfaces. The polar curves roughness parameter shrank from circular an elliptical shape, direction as minor axis. rates cycles mutually interrelated levels, which had tendency be fast initially then slow down under higher stress. Influenced by direction, surfaces degenerated anisotropically sustained most serious along direction. Two fitting formulas proposed, could aid assessment residual histories cumulative wear degree.