TY - JOUR

T1 - On an experimental-computational approach for localised durability assessment of sliding contacts

AU - Pusterhofer, Michael

AU - Grün, Florian

N1 - Publisher Copyright: © 2021 The Authors

PY - 2021

Y1 - 2021

N2 - Several approaches exist to manage the difficult task of assessing the time point of failure of a sliding contact. However, limitations to the freedom of the system design or the consideration of the loading history reduce the applicability of previous developments. Combined computational-experimental approaches, as they are already presented in literature for the prediction of stable linear wear, can provide much accurate results, also for the prediction of destabilization of tribo systems. The authors use such a combined approach to transfer the durability behaviour from an experimental model system (Ring-on-Disc) onto an arbitrary target application (Journal bearing geometry) with the same material combination. Internal tribo system interactions between the system components are obtained by the experimental model tester, while the consideration of different hydrodynamic and asperity contact pressure at the target system is managed in a computational way. With a cumulative damage approach, the different local load histories can be evaluated. The results visualize the locations on the journal bearing shell where destabilization, regarding a mild-severe wear transition or a seizure event with friction peak, will occur first. In combination with the validation tests at the journal bearing-target application it turns out, that already at a low cumulative damage coverage a macroscopic observable destabilization of wear and friction properties occurs.

AB - Several approaches exist to manage the difficult task of assessing the time point of failure of a sliding contact. However, limitations to the freedom of the system design or the consideration of the loading history reduce the applicability of previous developments. Combined computational-experimental approaches, as they are already presented in literature for the prediction of stable linear wear, can provide much accurate results, also for the prediction of destabilization of tribo systems. The authors use such a combined approach to transfer the durability behaviour from an experimental model system (Ring-on-Disc) onto an arbitrary target application (Journal bearing geometry) with the same material combination. Internal tribo system interactions between the system components are obtained by the experimental model tester, while the consideration of different hydrodynamic and asperity contact pressure at the target system is managed in a computational way. With a cumulative damage approach, the different local load histories can be evaluated. The results visualize the locations on the journal bearing shell where destabilization, regarding a mild-severe wear transition or a seizure event with friction peak, will occur first. In combination with the validation tests at the journal bearing-target application it turns out, that already at a low cumulative damage coverage a macroscopic observable destabilization of wear and friction properties occurs.

UR - http://www.scopus.com/inward/record.url?scp=85112758815&partnerID=8YFLogxK

U2 - 10.1016/j.wear.2021.204068

DO - 10.1016/j.wear.2021.204068

M3 - Article

VL - 486-487.2021

JO - Wear

JF - Wear

SN - 0043-1648

IS - 15 December

M1 - 204068

ER -