Relations between thickness of UHMWPE’s wear debris and positive pressure of tribological system

Abstract

MiaoXAM2.5X-50X Ultrahigh Precision Surface 3D Profiler is introduced to research the relations between thickness of UHMWPE’s wear debris and positive pressure of tribological system. Research results show that thickness of wear debris owns evident classification, and the first grade thickness math model and the second grade thickness math model are built. By the second grade thickness math model, the true force condition in the tribological system can be gotten, and the model can be used as a tool to modify simulating parameters of the tribological system, and it is an important inspecting method to the airtight system which cannot be examined in real time. The first grade thickness math model can describe the true working load and surface condition of work piece in the tribological system, and is an effective description method for the running condition of frictional pairs. The research results at different lubricating conditions testify the relations between thicknesses of wear debris and positive pressure of the tribological system. The fractal relation between maximal thickness of wear debris and positive pressure is discussed. The conceptions of the immutability principle and characteristic granularity of wear debris thickness are brought forward and discussed. In conclusion, as a stable tribological parameter owning mechanical theory basis, wear debris thickness will play an important part in fault diagnosis, especially for the airtight system such as artificial joint.