Modelling adhesive wear extension in fretting interfaces: An advection-dispersion-reaction contact oxygenation approach

Abstract

This paper aims at modelling contact oxygenation concept (COC) which describes the effects of fretting loading conditions on di-oxygen flow within the interface and the associated partition between abrasive and adhesive wear domains in fretting wear scars. This is achieved by modelling oxygen transport within fretting interface using an advection-dispersion-reaction approach (ADR) by considering debris bed as a compact porous medium traversed by atmospheric gases. ADR model is calibrated using three fretting tests of flat-on-flat 34NiCrMo16 interface. Results show that ADR approach can predict the partition of abrasion and adhesion for wide range of sliding frequencies, normal forces and contact sizes. Besides, it can capture the transition of wear mechanisms from pure abrasive to mixed abrasive-adhesive wear at different loading conditions.

Modeling adhesive and abrasive wear phenomena in fretting interfaces: A multiphysics approach coupling friction energy, third body and contact oxygenation concepts

“…Note that the experimental results extracted from [15] which are presently simulated were not duplicated. As matter of fact, many research works [10,15,16,18] confirm the high reproducibility of fretting wear test. This high reproducibility may be explained by the fact that compared to common reciprocating and pin on dick tests, the material volume stressed by the fretting sliding is comparatively very small which reduces in consequence the scattering induced by the material inhomogeneity.…”

“…expresses the extension of the abrasive wear domain toward the inner part of the contact (After [16,22]).…”

“…The faster is the oxidation rate, the faster is the reduction of 𝑃 𝑂 2 and finally the larger is the inner adhesive wear domain. The Contact Oxygenation Concept was quantified and formalized by Baydoun et al [16] by considering an Advection-Dispersion-reaction (ADR) model. This ADR model developed for a 3D contact configuration (i.e.…”

“…This ADR model developed for a 3D contact configuration (i.e. 2D interface description) is fully detailed in [16]. However, in the current study, the ADR model will be transposed to a 2D contact configuration (i.e.…”

“…equivalent to the ambient air) but tends to decrease to a minimum value in the internal part of the contact. This concept was modeled using an Advection-Dispersion-Reaction approach assuming the debris layer as a porous medium crossed by atmospheric gases [16]. An ADR numerical model was developed to simulate the partition between adhesion and abrasion zones in crossed-flat low-alloyed steel contacts.…”