Numerical analysis of time-varying wear with elastic deformation in line contact

Abstract

Abstract:Wear is an important factor for failures of mechanical components. Current research on wear is mainly focused on experiments while the numerical simulation of wear is hardly used owing to the complexities of the wear process. Explaining the effect of friction on the wear process is important, as it will lead to a deeper understanding of the evolution of wear. This study proposed a numerical method to expound the wear process in the contact between an elastic cylinder and a half-space simulating the ring-block tester. There are two difficulties during the calculation; one is that the contact shapes vary with time, causing the pressure distribution to change simultaneously and the other is the integral equation for calculating the contact pressure under different worn shapes. In the present study, the wear rate was computed using Archard's law and the wear process was calculated step by step until the specified total sliding distance was achieved. During each step of the calculation, the contact topography was updated. The simulation intuitively reproduced the contact state of change from line to surface contact throughout the wear process. Reasonable agreements on the changes of the wear scar, achieved from experiments and numerical simulations, were obtained.

Numerical solution of dry friction in point contact using the unified Reynolds method combined with rarefied gas effect

“…The numerical solution of elastic deformation equation (14) can be performed using the conjugate gradient method, and a specific realization of the numerical process can be found in the literature. 6,23…”

“…The numerical solution of elastic deformation equation ( 14) can be performed using the conjugate gradient method, and a specific realization of the numerical process can be found in the literature. 6,23 Iterative procedure When calculating the above lubrication equation by the finite difference method, the computational domain needs to be meshed. In theory, the finer the mesh is, the higher the accuracy of the numerical calculation results, but the time spent in the calculation will also increase exponentially.…”

A New Method for Measuring Stress Inside Movable Element in Contact

“…Many studies have applied this method to contact stress analysis [13,[17][18][19][20]. Zhan et al used numerical calculation combined with photoelastic experiment to solve the distribution of rolling contact pressure and describe the evolution of contact stress field in the wear process [19,21]. Bryant used the photoelastic technology to measure the photoelasticity experimental images between the contact interfaces with or without sliding [22].…”

A New Method for Measuring Stress Inside Movable Element in Contact

“…Many studies have applied this method to contact stress analysis [13,[17][18][19][20]. Zhan et al used numerical calculation combined with photoelastic experiment to solve the distribution of rolling contact pressure and describe the evolution of contact stress field in the wear process [19,21]. Bryant used the photoelastic technology to measure the photoelasticity experimental images between the contact interfaces with or without sliding [22].…”