Validation of statistic and deterministic asperity contact models using experimental Stribeck data
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In: Tribology International, Vol. 165.2022, No. January, 107329, 01.2022.
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TY - JOUR
T1 - Validation of statistic and deterministic asperity contact models using experimental Stribeck data
AU - Maier, Michael
AU - Pusterhofer, Michael
AU - Summer, Florian
AU - Grün, Florian
N1 - Publisher Copyright: © 2021 The Authors
PY - 2022/1
Y1 - 2022/1
N2 - Contact models are used, among others, to describe the asperity contact in lubricated contacts. In recent decades, a large number of contact models have been developed based on different approaches. In this article a selection of classical statistical contact models are compared with a deterministic FE model. The validation of the different approaches was carried out applying an indirect methodology. By comparing a numerically determined Stribeck curve, on which the characteristics of the contact model has a significant influence, and experimentally determined Stribeck curves, the applicability of the different contact models can be evaluated. The influence of elastic and elastoplastic material behaviour in the deterministic contact model on the asperity contact pressure curves and Stribeck curves, respectively, was examined during the investigations. The results show, that the elastic FEM contact model and the statistical model according to Greenwood and Tripp provide the best agreement with the experimental Stribeck data. This can be attributed to the fact that the roughness peaks are smoothed immediately in the early contact stage and the smoothed surface behaves almost elastically.
AB - Contact models are used, among others, to describe the asperity contact in lubricated contacts. In recent decades, a large number of contact models have been developed based on different approaches. In this article a selection of classical statistical contact models are compared with a deterministic FE model. The validation of the different approaches was carried out applying an indirect methodology. By comparing a numerically determined Stribeck curve, on which the characteristics of the contact model has a significant influence, and experimentally determined Stribeck curves, the applicability of the different contact models can be evaluated. The influence of elastic and elastoplastic material behaviour in the deterministic contact model on the asperity contact pressure curves and Stribeck curves, respectively, was examined during the investigations. The results show, that the elastic FEM contact model and the statistical model according to Greenwood and Tripp provide the best agreement with the experimental Stribeck data. This can be attributed to the fact that the roughness peaks are smoothed immediately in the early contact stage and the smoothed surface behaves almost elastically.
KW - Contact mechanics
KW - Elastohydrodynamic
KW - Finite element method
KW - Mixed friction
UR - http://www.scopus.com/inward/record.url?scp=85118865962&partnerID=8YFLogxK
U2 - 10.1016/j.triboint.2021.107329
DO - 10.1016/j.triboint.2021.107329
M3 - Article
AN - SCOPUS:85118865962
VL - 165.2022
JO - Tribology International
JF - Tribology International
SN - 0301-679X
IS - January
M1 - 107329
ER -