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Effect of thickness and reinforcement configuration on flexural and impact behaviour of GFRP laminates after exposure to elevated temperatures

Bazli, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.compositesb.2018.08.054
  3. Publisher: Elsevier Ltd , 2019
  4. Abstract:
  5. 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. © 2018 Elsevier Ltd
  6. Keywords:
  7. Bending ; Charpy impact ; Elevated temperature ; Fibre orientation ; GFRP laminates ; Bending (forming) ; Bending tests ; Charpy impact testing ; Degradation ; Fibers ; Regression analysis ; Bayesian regression method ; Degradation mechanism ; Impact energy absorption ; Probabilistic models ; Laminates
  8. Source: Composites Part B: Engineering ; Volume 157 , 2019 , Pages 76-99 ; 13598368 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S1359836818321577