Modélisation simplifiée de l’usure dans les liaisons à contact conforme – Application aux aubes à calages variables

Mastering engine maintenance is a key issue for airline companies. To avoid aircraft being grounded for extended and costly periods, it is strategically important to anticipate maintenance cycles, and therefore the wear of systems. In this context, we focus specifically on VSV (Variable Stator Vane) systems, which play a critical role in the efficiency of high-pressure compressors. These systems include several critical components, among which the bushings are particularly important. The guidance of a vane relative to the stator is achieved using two flanged bushings, which are subjected to both radial and axial loads due to the airflow forces acting on the vane. This loading, combined with the movements of the system, leads to localized wear on the bushings, affecting both cylindrical and flat contact surfaces. Understanding and controlling these wear phenomena is therefore essential to ensure the reliability and efficiency of next-generation engines. The objective of this work is to develop a fast and reliable tool for predicting the wear of these components over a large number of flight cycles.