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Failure Mechanism of Polytetrafluoroethylene Under Friction Fatigue

Authors
  • Zobaer Shah, Quazi Md.
  • Asaduzzaman Chowdhury, Mohammad
  • Arefin Kowser, Md.
Type
Published Article
Journal
Journal of Failure Analysis and Prevention
Publisher
Springer US
Publication Date
Jan 25, 2019
Volume
19
Issue
1
Pages
245–249
Identifiers
DOI: 10.1007/s11668-019-00595-0
Source
Springer Nature
Keywords
License
Yellow

Abstract

Being a semicrystalline polymer, polytetrafluoroethylene (PTFE) has been used in sophisticated applications as biological implants where mechanical properties like low coefficient of friction, resistance to corrosion, and biocompatibility are the major concerns. However, these substitutes should own longevity for continuous working against cyclic loading conditions. In this study, friction effect on the fatigue life of PTFE has been observed through experimental and numerical analysis. Asymptotic behavior of penetration depth relation with fatigue life suggests consideration on friction fatigue. Conditional load application on rotating specimen showed that, while being used as substrate under cyclic loading, shape optimization should be considered as design factor.

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