The effect of asperity geometry on the wear behaviour in sliding of an elliptical asperity

T Mishra and M de Rooij and DJ Schipper, WEAR, 470, 203615 (2021).

DOI: 10.1016/j.wear.2021.203615

An analytical model has been developed to study the effect of asperity geometry on the abrasive wear behaviour of an ellipsoidal asperity sliding through a plastically deforming substrate. The model computes the penetration depth and wear profile of the substrate as a function of the applied load and asperity geometry, i.e. asperity?s axes sizes and orientation relative to the sliding direction. Also using the wear profile obtained from the numerical-material point method (MPM) simulations, the area of the worn track is computed as a function of the asperity geometry. Sliding experiments are performed on a lubricated steel substrate to characterize the wear volume as a function of the asperity geometry and applied load, the degree of wear parameterized based on the degree of penetration and curve-fitted to be implemented in the developed analytical model. The MPM model is used along with the analytical model to study the transition between the abrasive wear modes. The analytical wear volume is compared with the experimental wear volume and found to be in good agreement.

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