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Accepted (AM)Open Access (License Unspecified), Open
Journal article
Notched fatigue behavior of PEEK
Biomaterials, v 31(35), pp 9156-9162
2010
PMID: 20864160
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Poly(ether-ether-ketone) (PEEK) has been used as a load bearing orthopaedic implant material with clinical success. All of the orthopaedic applications contain stress concentrations (notches) in their design; however, little work has been done to examine the fatigue behavior of PEEK in the presence of a notch. This work examines both stress-life (S–N) fatigue behavior and the fracture behavior of unfilled PEEK under tension–tension loading in circumferentially grooved round bar specimens with different elastic stress concentration factors. It was found that the majority of the loading was elastic in nature, and that there was only a small portion on the lifetime where there was a detectable change in structural behavior prior to gross fracture. Fractographic analysis via SEM further elucidated the potential fracture micromechanisms. Additional analysis was conducted to estimate the percent of the lifetime spent in crack initiation vs. propagation, and it was found that the specimens spent the majority of the time in the crack initiation phase.
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Details
- Title
- Notched fatigue behavior of PEEK
- Creators
- Michacl C. Sobieraj - Case Western Reserve UniversityJames E. Murphy - Case Western Reserve UniversityJennifer G. Brinkman - Case Western Reserve UniversitySteve M. Kurtz - ExponentClare M. Rimnac - Case Western Reserve University
- Publication Details
- Biomaterials, v 31(35), pp 9156-9162
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000284393300002
- Scopus ID
- 2-s2.0-77957949415
- Other Identifier
- 991019201388504721
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- Web of Science research areas
- Engineering, Biomedical
- Materials Science, Biomaterials