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<p>Enhancement of the Blast Resistant Designs is critically important for the protection of structures against the dynamic loading conditions. In the present work, the blast mitigating capability of the polyurea coated steel plate is experimentally investigated in the vertical shock tube facility for the three different types of coating configurations; steel plate with polyurea coating on its front (PUF), back (PUB) and both sides of the plate (PUD) are exposed to the shock load. These three configurations are considered of all the possible combinations because only in these cases, polyurea can undergo rate-dependent hyper-elastic deformation to absorb the blast induced shock energy. From the comparison of the experimental mid-deflection results of the polyurea coated configurations PUB, PUF and PUD, it is reported that the polyurea coating on the front side (PUF) of the mild steel plate has shown lower mid-deflection than the polyurea coating on the back side (PUB). Numerical investigation is carried out to capture the energy absorption capability of the polyurea coated plates PUB, PUF and PUD using 3D Lagrange finite element analysis. The rate-dependent and the hyper-elastic material model constants are extracted from the reported stress–strain response of the mild steel and polyurea for the quasi-static and high strain rate tensile test experiments. From the numerical investigation it is observed that the polyurea front coating configurations of the coated plates showed higher energy absorption capability, thereby, resulted in the reduction of induced plastic strains at the clamped edge.</p>

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Influence of Coating Side on the Blast Mitigation Response of Polyurea Coated Plates for Blast Resistant Designs: Experimental and Numerical Assessment

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • A. Prakash,
  • A. V. S. Siva Prasad,
  • Raguraman Munusamy,
  • Jagadeesh Gopalan

摘要

Enhancement of the Blast Resistant Designs is critically important for the protection of structures against the dynamic loading conditions. In the present work, the blast mitigating capability of the polyurea coated steel plate is experimentally investigated in the vertical shock tube facility for the three different types of coating configurations; steel plate with polyurea coating on its front (PUF), back (PUB) and both sides of the plate (PUD) are exposed to the shock load. These three configurations are considered of all the possible combinations because only in these cases, polyurea can undergo rate-dependent hyper-elastic deformation to absorb the blast induced shock energy. From the comparison of the experimental mid-deflection results of the polyurea coated configurations PUB, PUF and PUD, it is reported that the polyurea coating on the front side (PUF) of the mild steel plate has shown lower mid-deflection than the polyurea coating on the back side (PUB). Numerical investigation is carried out to capture the energy absorption capability of the polyurea coated plates PUB, PUF and PUD using 3D Lagrange finite element analysis. The rate-dependent and the hyper-elastic material model constants are extracted from the reported stress–strain response of the mild steel and polyurea for the quasi-static and high strain rate tensile test experiments. From the numerical investigation it is observed that the polyurea front coating configurations of the coated plates showed higher energy absorption capability, thereby, resulted in the reduction of induced plastic strains at the clamped edge.