Explicit formulations of adhesive wear extension in fretting interfaces applying the contact oxygenation concept

Friction energy wear approach

“…Note assuming an infinite transverse contact width and neglecting the advection contribution, a 1D explicit formulation of the local dioxygen partial pressure profile along the median axis of can be derived (Fig. 9b) [26]. The comparison with the complete 2D surface simulations confirms the stability of these simplified closed-form approximations .…”

“…By comparing the profile of the di-oxygen partial pressure in the interface, it is possible to predict the lateral extension of the abrasive wear domain (d 0 ) inner which the contact oxygenation is no more satisfied so that adhesive wear is occurring. interface [26]. (c) Comparison between 2D complete ADR modeling (1) and explicit formulation derived for 1D line contact neglecting advection contribution [26].…”

“…interface [26]. (c) Comparison between 2D complete ADR modeling (1) and explicit formulation derived for 1D line contact neglecting advection contribution [26].…”

“…Fig.9: (a) EDX mapping of a 34NiCrMo16 flat-on-flat fretting contact (determination of the 𝐝 𝐎,𝐞𝐱𝐩 length scales by comparing the concentration of oxygen versus iron), modeling O 2 partial pressure within the fretted interface using the 2D complete ADR modeling (Advection-Dispersion-Reaction), prediction of the partition between abrasive and adhesive wear domains assuming P O2,th = 0.1 Pa[25]. (b) Comparison between experimental and predicted abrasive wear area in various square, rectangular and circular flat on flat contact configurations for a 34NiCrMo16/34NiCrMo16 interface[26]. (c) Comparison between 2D complete ADR modeling (1) and explicit formulation derived for 1D line contact neglecting advection contribution[26].…”

Comparison between physical and machine learning modeling to predict fretting wear volume

“…. By combining all the test conditions, a total of 150 tests is used for both training and validation of the neural network which are fully described in previous articles [21,23,24](Fig. 3).…”