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The blast wave mitigating characteristics of five different unidirectional FRP composite laminates and mild steel samples are compared through shock tube experiments for two blast wave Mach numbers 1.52 and 1.61. The driver and driven section of the shock tubes are 100 mm and 2000 mm. Helium gas was used as a working fluid. The blast wave peak overpressures were measured using five flush-mount PCB pressure transducers kept inside the driven section at an equal spacing of 375 mm. The strain experienced on metal and composite samples during blast loading was measured using 5 mm linear GOBLET and foil strain gauges. The displacement of samples was captured using a high-speed camera with a frame rate of 67,500 Hz with a pixel resolution of 256 × 256. It is observed that the carbon metal epoxy and carbon epoxy have the highest strain compared to other samples. Plastic deformations were noticed in composite samples in subsequent experiments. The composites with metal cores disintegrated, and the other composites got cracks at higher blast loadings due to the use of unidirectional fibers.

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A Comparative Study on the Blast Wave Mitigation in Different Composite Materials Using Shock Tube Experiments

  • 会议论文

  • 发表日期：

    2025年

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  • Murugan Thangadurai,
  • Prahlad Joshi,
  • Abhishek Kundu,
  • Amar Yadav,
  • Debopam Das,
  • Sashi Kanta Panigrahi

摘要

The blast wave mitigating characteristics of five different unidirectional FRP composite laminates and mild steel samples are compared through shock tube experiments for two blast wave Mach numbers 1.52 and 1.61. The driver and driven section of the shock tubes are 100 mm and 2000 mm. Helium gas was used as a working fluid. The blast wave peak overpressures were measured using five flush-mount PCB pressure transducers kept inside the driven section at an equal spacing of 375 mm. The strain experienced on metal and composite samples during blast loading was measured using 5 mm linear GOBLET and foil strain gauges. The displacement of samples was captured using a high-speed camera with a frame rate of 67,500 Hz with a pixel resolution of 256 × 256. It is observed that the carbon metal epoxy and carbon epoxy have the highest strain compared to other samples. Plastic deformations were noticed in composite samples in subsequent experiments. The composites with metal cores disintegrated, and the other composites got cracks at higher blast loadings due to the use of unidirectional fibers.