Effect of thickness and reinforcement configuration on flexural and impact behaviour of GFRP laminates after exposure to elevated temperatures. (15th January 2019)

• Record Type: Journal Article
• Authors: Bazli, Milad; Ashrafi, Hamed; Jafari, Armin; Zhao, Xiao-Ling; Gholipour, Hamed; Oskouei, Asghar Vatani
• Is Part Of: Composites. Number 157(2019)
• Page Start: 76
• Page End: 99
• Publication Date: 2019-01-15
• Subjects: GFRP laminates -- Elevated temperature -- Bending -- Charpy impact -- Fibre orientation; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2018.08.054
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: This study investigates the flexural and impact behaviour of GFRP laminates after exposure to elevated temperatures. The effect of fibre's length and orientation, laminate's thickness, and exposure time is studied. A total number of 540 tests in terms of three-point bending and Charpy impact tests were conducted to obtain the mechanical properties. In addition, SEM analyses were carried out to investigate the degradation mechanisms. Finally, statistical study was conducted to investigate the contribution of each variable and develop probabilistic models using ANOVA and linear Bayesian regression method. The results showed that generally the flexural and impact properties of GFRP laminates decrease by increasing the temperature and time of exposure as well as decreasing the laminates' thickness. It is also observed that laminates with unidirectional fibres have the best performance under elevated temperatures, while laminates with randomly distributed fibres are the most vulnerable type. The performance of laminates with woven fibres are almost between those two other types. However, all types of the laminates lost almost all their flexural strength and impact energy absorption capacity at 300 °C.