接触爆炸下聚脲涂层增强钢板的抗爆性能

The blast-resistant performances of single-layer steel plates and polyurea-coated steel plates under contact explosion are studied to address the protection requirements of armored vehicles and other weapons. Both experimental and numerical simulation approaches are employed to analyze the damage modes and protection mechanisms of steel plates with different areal densities and polyurea coating positions. The impact of the ratio of polyurea thickness to steel plate thickness on the blast-resistant performance of the composite structure is also explored. The results show that coating the back face of steel plate with constant thickness polyurea can effectively reduce the perforation and tensile failure on its back and decrease the residual displacement, while coating the front face with constant thickness polyurea can significantly enhance the blast resistance of the structure and greatly reduce the damage to the steel plate under contact explosion. Under the condition of the same areal density, the energy absorption performance of polyurea is positively correlated with its thickness, but the excessive thickness of polyurea may cause greater deformation and reduced stability of the composite structure. Taking into account the deformation, velocity attenuation and energy absorption of polyurea-coated steel plates, the study finds that the steel plate with a polyurea layer on the front face at a thickness ratio of 1颐 0. 78 has the best blast-resistant performance within the scope of the research.