@article{BERGMANN2024, 
author = {André BERGMANN and Jens SUMPF and Niels DALLINGER and Martin MONEKE and Markus GOLDER},
title = {Semi-analytical calculation model for friction of polymers on the example of POM | PE-UHMW and steel | PE-UHMW},
year = {2024},
journal = {Friction},
volume = {12},
number = {10},
pages = {2355-2369},
keywords = {tribology, friction, polymers, model, contact, polyoxymethylene (POM), polyethylene with ultra-high molecular weight (PE-UHMW)},
url = {https://www.sciopen.com/article/10.1007/s40544-024-0887-2},
doi = {10.1007/s40544-024-0887-2},
abstract = {In this paper, a semi-analytical calculation model for the coefficient of friction (COF) of single spherical protrusions is presented. It allows the prediction of the deformative friction part  (μdef) and adhesive friction part  (μadh) of the friction pairings steel | polyethylene with ultra-high molecular weight (PE-UHMW) and polyoxymethylene (POM) | PE-UHMW. The experimental studies included unlubricated friction tests, which served to determine the total COF  (μtot), as well as tests being lubricated with silicone oil, from which  μdef is obtained. Based on the verification tests, it could be shown that both states of lubrication result in the same deformation and that the relationship between the rear angle  (ω) and  μdef postulated in the calculation model is valid. Therefore, friction tests with segmented spheres were carried out, which allow a specific variation of the  ω.It can be concluded that for both pairings the  μdef is generally of minor significance (approx. 1/3  μtot) and the influence of the  μadh predominates (approx. 2/3  μtot) the friction process. Furthermore the  μtot decreases with increasing contact pressure especially in the low pressure range and depends on the form of motion (continuous and discontinuous).}
}