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Influence of SMA reinforcement on the impact resistance of GFRP composite laminates under different temperatures


Plain glass fibre-reinforced polymeric (GFRP) laminates and GFRP reinforced with randomly oriented short strips of shape memory alloy (SMA) were prepared by hand lay-up method. The SMA strip reinforcement was placed at 0.75 × thickness of the laminate with weight fractions of 2, 4 and 6%. The specimens were exposed to drop weight impact test and the experiments were conducted at a constant impact velocity of 2.80 m s−1 with different test temperatures such as 303, 333 and 363 K. The impact damage area was evaluated using lighting technique and fracture response was analysed using scanning electron microscopic (SEM) images. Absorption of impact energy and damage area due to low velocity impact were calculated. It was observed that with the higher temperature, the SMA/GFRP laminates exhibit marginally-enhanced damage resistance compared to the plain GFRP laminates. Also, addition of SMA reinforcement was not contributing much to the impact resistance at higher temperature.

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Pazhanivel is grateful to Prof BTN Sridhar, Anna University, for the fruitful discussion and encouragement. He also acknowledges the help rendered by Mr B Balaji for his help in carrying out the experiments.

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Correspondence to K PAZHANIVEL.

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PAZHANIVEL, K., BHASKAR, G.B., ELAYAPERUMAL, A. et al. Influence of SMA reinforcement on the impact resistance of GFRP composite laminates under different temperatures. Bull Mater Sci 39, 889–899 (2016).

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  • GFRP laminates
  • shape memory alloy
  • low velocity impact
  • impact resistance
  • SEM