Please use this identifier to cite or link to this item: doi:10.22028/D291-29332
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Title: Contact Area and Shear Stress in Repeated Single-Asperity Sliding of Steel on Polymer
Author(s): Pei, Xian-Qiang
Lin, Leyu
Schlarb, Alois K.
Bennewitz, Roland
Language: English
Title: Tribology Letters
Volume: 67
Issue: 1
Startpage: 1
Endpage: 12
Publisher/Platform: Springer
Year of Publication: 2019
Publikation type: Journal Article
Abstract: A model for the contact area of a single asperity sliding in a groove after repeated cycles is presented. Based only on the asperity geometry and on data from friction experiments, the model predicts the area of the asymmetric elliptical contact of the asperity sliding in its own groove. It thus allows to determine the shear stress of the steel–polymer couple in the relevant geometry without need for further microscopy of indenter or groove. The model was validated by experiments with an indenter manufactured from slide bearing steel and polyether-ether ketone (PEEK) as substrate. In experiments of 1000 repeated cycles, the contact area was found to vary with varying load and sliding velocity, while the shear stress was 20.5 MPa at a normal pressure of 50–70 MPa, independent of velocity when friction heating is still negligible. Model and experimental confirmation advance single-asperity friction experiments into an efficient method to extract shear stress and contact area for an understanding of sliding friction in metal-polymer contacts.
DOI of the first publication: 10.1007/s11249-019-1146-y
Link to this record: hdl:20.500.11880/28131
ISSN: 1023-8883
Date of registration: 17-Oct-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Physik
Professorship: NT - Keiner Professur zugeordnet
Collections:Die Universitätsbibliographie

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