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Composites: Mechanics, Computations, Applications: An International Journal

Published 4 issues per year

ISSN Print: 2152-2057

ISSN Online: 2152-2073

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FEM ANALYSIS OF BLAST PROOF SANDWICH COMPOSITE TO DETERMINE THE OPTIMAL GROUND CLEARANCE OF MINE PROTECTION VEHICLE

Volume 13, Issue 4, 2022, pp. 1-17
DOI: 10.1615/CompMechComputApplIntJ.2022042579
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ABSTRACT

It has been a constant endeavor of the armed forces to build vehicles that can transport soldiers in hostile terrain while reducing threats to their lives. The strength of these vehicles used to mitigate the blast effect is directly proportional to the mass of the explosives used for the blast. The challenge lies in designing an operationally effective mine protection vehicle (MPV) with appropriate protective measures to safeguard the lives of its occupants while maintaining high fuel efficiency high. It has been reported that the greater the standoff distance of explosive from the hull of a vehicle, the less is the effect of the blast. However, the ground clearance of a vehicle cannot be increased beyond a limit as it would seriously affect its stability. In this study, the optimal ground clearance of MVPs was investigated so that any blast would have the least effect on the vehicle chassis. The blast-proof material used in this study is a novel sandwich composite invented by Ariharan et al. (2019).

Figures

  • Standoff distance (SoD) and ground clearance of vehicles
  • Peak overpressure calculation for TNT blast of 6, 8, and 10 kg [at SoDs of 1, 0.5, and
0.305 m (1 ft)]
  • Peak overpressure at various SoDs (6 kg TNT)
  • Peak overpressure at various SoDs (8 kg TNT)
  • Peak overpressure at various SoDs (10 kg TNT)
  • Patented blast proof sandwich material comprised of multilayer composite
  • Variation of peak overpressure (1), von Mises stress (2) and deformation (3) for 6 kg
TNT [at SoDs of 1, 0.5, and 0.305 m (1 ft)]
  • Variation of peak overpressure, von Mises stress, and deformation for 8 kg TNT [at SoDs
of 1 m, 0.5 m, and 0.305 m (1 ft)]
  • Simulation of von Mises stress for 8 kg TNT blast at 0.5 m standoff distance
  • The von Mises (yield) stress versus peak pressure at various SoD (6 kg TNT)
  • The von Mises (yield) stress versus peak pressure at various SoD (8 kg TNT)
  • Experimental result with undamaged sandwich specimen at optimal SoD
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