Fatigue characterization of polyethylene under mixed mode I/III conditions

Mixed mode I/III fatigue fracture behaviour of bulk polymers is scarcely investigated. Thus, the aim of this work is to focus on the comparison of pure mode I and mixed mode I/III fatigue loading of polyethylene. During mixed mode I/III testing, both increases and decreases of lifetime were observed, depending on the levels of applied mode I and mode III loading. Additionally, the critical influence of friction and the accompanying increase of local temperature between the shear loaded crack flanks in mode III, as well as the dominant fracture mechanisms were discussed based on the fracture surface morphology.

Keywords

Mixed Mode I/III fatigue loading, Polyethylene, Fracture surface analysis, Equivalent stress intensity factor, Polymer

Citation

INTERNATIONAL JOURNAL OF FATIGUE. 2021, vol. 145, issue 1, p. 1-13.
https://www.sciencedirect.com/science/article/pii/S0142112320306162

Document type

Peer-reviewed

Document version

Published version

Language of document

en

Document licence

Creative Commons Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/