A Stress-Criterion-Based Model for the Prediction of the Size of Wear Particles in Boundary Lubricated Contacts

Abstract

In this paper, the formulation and validation of a model for the prediction of the wear particles size in boundary lubrication is described. An efficient numerical model based on a well-established BEM formulation combined with a mechanical wear criterion was applied. The behavior of the model and particularly the influence of the initial surface roughness and load was explored. The model was validated using measurements of the wear particles formed in steel-steel and steel-brass contacts. In the case of steel-steel contact, a reasonable quantitative agreement was observed. In the case of steel-brass contact, formation of the brass transfer layer dominates the particles generation process. To include this effect, a layered material model was introduced.

A review of recent advances in tribology

“…In other words, it requires a material rupture criterion to model the formation and detachment of wear particles. Numerous criteria have been proposed, including the critical accumulated dissipated energy, critical accumulated plastic strain, critical accumulated damage, critical Von Misses stress, and their variants [664].…”

Modeling and simulation in tribology across scales: An overview

“…Wear modeling approaches can be decomposed into continuum and discrete types. Continuum models, which include the popular finite element (FE) approach (see §2.2), have the advantage of being comparatively computationally affordable, while it is also fairly easy to introduce material parameters within macroscopic constitutive laws [605][606][607][608][609][610][611]. Correspondingly, DDD (see §2.3) has been recently used as a mesoscale approach to investigate plasticity upon asperity collision [421,612,613].…”

Selected Problems of Experimental Testing Marine Stern Tube Bearings

“…The subsequent wear tests were performed with the use of the tribotesters such as: the "cylinder on disc" [44][45] [46], "pin on disc" [47] [48], "block on ring" [49] and " ball on disc" [50]. During the tests the following quantities were measured a. o.: the friction coefficient at different sliding speeds, lubricating film thickness, radial wear of material, loss of journal mass, surface morphology of used elements as well as a change in surface roughness.…”