Testing and modelling the fatigue behaviour of GFRP composites – Effect of stress level, stress concentration and frequency

Ferdous, Wahid ORCID: https://orcid.org/0000-0002-4473-4722 and Manalo, Allan and Peauril, Joshua and Salih, Choman and Reddy, Kakarla Raghava and Yu, Peng and Schubel, Peter and Heyer, Tom (2020) Testing and modelling the fatigue behaviour of GFRP composites – Effect of stress level, stress concentration and frequency. Engineering Science and Technology, an International Journal, 23 (5). pp. 1223-1232. ISSN 2215-0986

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Abstract

The effects of stress level, stress concentration and frequency on the fatigue life of glass fibre reinforced polymer (GFRP) composites have been investigated under tension-tension fatigue at a stress ratio of 0.1. Vinyl ester-based GFRP laminates were tested at a stress level of 80%, 70%, 60%, 50%, 40% and 25% of the ultimate tensile strength until the failure or up to 8 million cycles whichever comes first in order to determine fatigue life and identify failure modes. The results showed that the composites failed in pure tension at high applied stress while the failure was dominated by stress concentration at low stress level. Moreover, stress concentration was found to reduce the fatigue life of the laminated composites and the test frequency of up to 8 Hz did not induce excessive self-heating. The mean stress failure criteria was found appropriate for numerical modelling of GFRP composites subjected to low level of stress while Goodman failure criteria is suitable at high stress condition. The analytical model considering the effect of stress ratio, applied maximum stress, frequency and material properties is able to predict reliably the fatigue life of GFRP composites in tension.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 16 Jun 2020 01:08
Last Modified: 21 Apr 2021 06:09
Uncontrolled Keywords: Glass fibres; Stress concentration; Failure theory; Analytical model
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
B Economic Development > 87 Construction > 8798 Environmentally Sustainable Construction > 879899 Environmentally Sustainable Construction not elsewhere classified
B Economic Development > 87 Construction > 8702 Construction Design > 870202 Commercial Construction Design
Funding Details:
Identification Number or DOI: https://doi.org/10.1016/j.jestch.2020.01.001
URI: http://eprints.usq.edu.au/id/eprint/37869

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