Fracture characteristics of PEEK at various stress triaxialities

Chen, Fei and Gatea, Shakir and Ou, Hengan and Lu, Bin and Long, Hu (2016) Fracture characteristics of PEEK at various stress triaxialities. Journal of the Mechanical Behavior of Biomedical Materials, 64 . pp. 173-186. ISSN 1751-6161

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Abstract

Polyether-ether-ketone (PEEK) is an alternative to metal alloys in orthopaedic applications. It gives significant advantages including excellent mechanical properties and non-toxicity. In this work, a set of specimens with different notched radii were selected to examine the effect of triaxial state of stress on the fracture behavior of PEEK. Fractographic analysis via scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) further elucidated the fracture micromechanisms. Distinct fracture patterns were identified under different stress triaxialities. In addition, the microstructural inclusion properties in PEEK specimen such as inclusion size and chemical composition were analysed and determined. Finite element simulations were carried out to evaluate the correlation of observed fracture characteristics with different stress triaxialities.

Item Type: Article
Keywords: PEEK; Stress triaxiality; Fracture; Finite element analysis
Schools/Departments: University of Nottingham UK Campus > Faculty of Engineering > Department of Mechanical, Materials and Manufacturing Engineering
Identification Number: https://doi.org/10.1016/j.jmbbm.2016.07.027
Depositing User: Eprints, Support
Date Deposited: 11 Aug 2016 09:55
Last Modified: 14 Sep 2016 16:15
URI: http://eprints.nottingham.ac.uk/id/eprint/35810

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