TY - JOUR

T1 - Wear simulation in lubricated contacts considering wear-dependent surface topography changes

AU - Maier, Michael

AU - Pusterhofer, Michael

AU - Grün, Florian

N1 - Publisher Copyright: © 2023

PY - 2023/2/18

Y1 - 2023/2/18

N2 - Along with friction, wear in lubricated contacts is one of the most essential design criteria. The use of low-viscosity lubricants, as well as changing operating conditions, may lead to the wear-causing operating condition of mixed friction. For wear assessment, in the last decades numerical simulations have been confirmed as a powerful tool. The level of detail of the simulation model has a significant influence on the simulation results. The local wear heights for a hydrodynamic journal bearing under constant operating conditions are calculated numerically. A variant study is used to determine the influence of elastic deformation, cavitation model and the consideration of the wear-dependent surface topography. The surface topography, which is subject to change especially during running-in, is taken into account in the form of wear-dependent asperity contact pressure curves, respectively wear-dependent flow factors. To validate the simulation results, tests were carried out on a rotational tribometer. The results show that the consideration of the wear-dependent surface topography has a significant influence on the wear development and thus the trend evaluated from the experiment can be better assessed.

AB - Along with friction, wear in lubricated contacts is one of the most essential design criteria. The use of low-viscosity lubricants, as well as changing operating conditions, may lead to the wear-causing operating condition of mixed friction. For wear assessment, in the last decades numerical simulations have been confirmed as a powerful tool. The level of detail of the simulation model has a significant influence on the simulation results. The local wear heights for a hydrodynamic journal bearing under constant operating conditions are calculated numerically. A variant study is used to determine the influence of elastic deformation, cavitation model and the consideration of the wear-dependent surface topography. The surface topography, which is subject to change especially during running-in, is taken into account in the form of wear-dependent asperity contact pressure curves, respectively wear-dependent flow factors. To validate the simulation results, tests were carried out on a rotational tribometer. The results show that the consideration of the wear-dependent surface topography has a significant influence on the wear development and thus the trend evaluated from the experiment can be better assessed.

KW - Wear simulation

KW - Mixed friction

KW - Multiscale Wear

KW - Surface topography change

KW - Lubricated contact

UR - http://www.scopus.com/inward/record.url?scp=85148350344&partnerID=8YFLogxK

U2 - 10.1016/j.matpr.2023.01.424

DO - 10.1016/j.matpr.2023.01.424

M3 - Article

VL - 93.2023

SP - 563

EP - 570

JO - Materials Today: Proceedings

JF - Materials Today: Proceedings

SN - 2214-7853

IS - 4

ER -