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利用MiaoXAM2.5X-50X超高精度三维轮廓仪从三维角度,对超高分子量聚乙烯在特定摩擦磨损试验条件下的磨屑厚度与正压力之间的对应关系进行了研究.研究表明:磨屑厚度具有明显的分级现象,建立了磨屑初级和次级厚度数学模型,磨屑次级厚度数学模型可推知系统中真实受力状态,作为修正系统模拟参数的依据,对于一些无法进行实时监测的封闭系统的仿真模拟,具有十分重要的意义;磨屑初级厚度模型可以真实反映摩擦学系统真实的受力情况和磨损表面状态,对探知系统的运转状况有着十分重要作用.通过对润滑条件与磨屑厚度关系的研究,验证了磨屑厚度与正压力之间的关系.研究了最大磨屑厚度与正应力之间的分形关系;提出了磨屑厚度的不变性原理和特征厚度的概念.试验结果表明,磨屑厚度对于试验条件具有很强的稳定性,同时,它作为摩擦学系统中具备力学理论依据的重要参数,也是更加稳定的一个参数,将在故障诊断中发挥重要作用,特别对人工关节等密闭状态下摩擦学系统监测具有重大意义.
Using the MiaoXAM2.5X-50X ultra-high-precision three-dimensional profiler, the relationship between wear debris thickness and positive pressure of ultra-high molecular weight polyethylene under specific friction and wear test conditions was studied from the perspective of three dimensions.The results show that wear debris The thickness of the grading is obviously graded, and the mathematical model of the primary and secondary thickness of wear debris is established. The mathematical model of wear secondary thickness can deduce the real stress state in the system as the basis to modify the system simulation parameters. For some real-time monitoring Closed system simulation is of great significance. The primary thickness model of wear debris can truly reflect the real stress condition and the wear surface condition of the tribology system, and plays an important role in detecting the operating condition of the system. The relationship between the thickness of cuttings and the positive pressure was verified, the fractal relationship between the maximum thickness of cuttings and normal stress was studied, and the principle of invariance of the thickness of cuttings and the concept of characteristic thickness were proposed. The results show that the thickness of the wear debris for the test conditions have a strong stability, at the same time, as a tribological system with mechanical theory Important parameter is based, is a more stable parameter, it will play an important role in fault diagnosis, especially of great significance to the tribological system for monitoring the closed state under artificial joints.