A Numerical Simulation Method for Ploughing Effect of Three-body Abrasion

Wear of moving parts is often one of the main reasons leading to the failure of the whole mechanical system. In aviation industry, a large number of functional components, such as hydraulic pumps, hydraulic valves, bearings and so on, are commonly born to the mode of failure - wear, which directly reduces the reliability and life of aircraft and other aviation equipment. In engineering applications, machinery is usually lubricated, which makes the wear form is mainly the three-body abrasion caused by the contaminant particles in the lubricating medium between the moving parts. Therefore, the simulation of three-body abrasion, the quantitative calculation and accurate prediction of wear volume are urgent to be studied. The numerical simulation method considering the surface morphology proposed in this paper firstly introduces the Monte-Carlo method to simulate the random distribution of particles in the contaminant oil, solving the problem of the description of the uncertain distribution of contaminant particles. Then we combine the Johnson-Cook model and the parabola theory and put forward a quantitative method for the calculation of wear caused by the three-body abrasion ploughing effect. Compared with using experience or commercial simulation software to deal with the similar problems, the three-body abrasion numerical simulation method proposed in this paper greatly simplifies the modeling process and reduces the simulation time. So it is an efficient simulation method. This method has certain guiding significance for selecting moving pair materials and designing moving pair structures. It can also evaluate the wear amount of the existing moving pair in order to improve the design and increase the wear life.