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Pre-sliding Behaviour of Single Asperity Contact

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Abstract

The pre-sliding and static friction force behaviour at asperity level between a smooth ball and a smooth flat surface at different normal loads, as well as friction behaviour during full slip has been studied. The normal load dependence of the friction force and the preliminary displacement is discussed when the mean contact pressure is kept under 100 MPa. The theoretical model to calculate the shear stress and the preliminary displacement in the contact is discussed and the experimental data were used to verify the model. The results show that for low applied normal loads the adhesion force has an influence on the friction force measurements. Furthermore, the results for the friction force and preliminary displacement show good agreement with the theoretical trends. The experiments along with the model can be used to analyse the tangential traction in the contact and the behaviour of the stick–slip area. The measurement results along with the model were used to calculate the maximum shear stress at the point of sliding for different applied normal loads. It is also shown that at low applied normal loads the shear stress is not constant as compared to relatively high applied normal loads due to the presence of adhesion force.

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Acknowledgments

This research was carried out under Project Number MC7.06284 in the framework of the Research Program of the Materials innovation institute (M2i) (www.m2i.nl). Financial support for carrying out this research from the M2i is gratefully acknowledged. The research is also a part of MOV-ET Project under program Point-One of Ministry of Economic Affairs, Agriculture and Innovation, The Netherlands. TNO Eindhoven is also thanked for their support and providing opportunity to perform experiments.

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Correspondence to M. A. Yaqoob.

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Yaqoob, M.A., Winogrodzka, A., Fischer, H.R. et al. Pre-sliding Behaviour of Single Asperity Contact. Tribol Lett 49, 553–562 (2013). https://doi.org/10.1007/s11249-012-0096-4

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  • DOI: https://doi.org/10.1007/s11249-012-0096-4

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