Hot tensile fracture characteristics and constitutive modelling of polyether-ether-ketone (PEEK)

Chen, Fei; Ou, Hengan; Gatea, Shakir; Long, Hui

Abstract

The effects of strain rate and deformation temperature on the deformation behaviors of polyether-ether-ketone (PEEK) were studied by uniaxial tensile tests with the temperature range of 23–150 °C and strain rate of 0.01–1 s−1. The effects of deformation temperature and strain rate on the hot tensile deformation behavior and fracture characteristics were investigated by scanning electron microscope (SEM) and discussed in detail. SEM experimental results suggest that fracture morphology is not strain rate sensitive but temperature sensitive. Based on the tensile results, the Johnson-Cook and modified Johnson-Cook constitutive models were established for PEEK. Furthermore, a comparative study has been made on the accuracy and effectiveness of the developed models to predict the flow stress. The results show that the original Johnson-Cook model reflects the deformation behavior more accurately throughout the entire test temperature and strain rate range under uniaxial tensile conditions.

Citation

Chen, F., Ou, H., Gatea, S., & Long, H. (2017). Hot tensile fracture characteristics and constitutive modelling of polyether-ether-ketone (PEEK). Polymer Testing, 63, https://doi.org/10.1016/j.polymertesting.2017.07.032

• Journal Article Type: Article
• Acceptance Date: Jul 27, 2017
• Online Publication Date: Aug 20, 2017
• Publication Date: Oct 31, 2017
• Deposit Date: Sep 8, 2017
• Publicly Available Date: Sep 8, 2017
• Journal: Polymer Testing
• Print ISSN: 0142-9418
• Electronic ISSN: 1873-2348
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 63
• DOI: https://doi.org/10.1016/j.polymertesting.2017.07.032
• Keywords: PEEK, Hot deformation, Fracture characteristics, Constitutive modelling
• Public URL: https://nottingham-repository.worktribe.com/output/890396
• Publisher URL: https://doi.org/10.1016/j.polymertesting.2017.07.032
• Contract Date: Sep 8, 2017