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

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

Authors

Fei Chen

Hengan Ou

Shakir Gatea

Hui Long



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.

Journal Article Type Article
Publication Date Oct 31, 2017
Journal Polymer Testing
Print ISSN 0142-9418
Electronic ISSN 1873-2348
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 63
APA6 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...ymertesting.2017.07.032
DOI https://doi.org/10.1016/j.polymertesting.2017.07.032
Keywords PEEK, Hot deformation, Fracture characteristics, Constitutive modelling
Publisher URL https://doi.org/10.1016/j.polymertesting.2017.07.032
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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