聚脲涂覆钢复合结构的抗爆效应

In order to investigate the antiknock performance of polyurea coated steel composite structures and the energy absorption mechanism of polyurea coatings, the 40 and 60 g TNT explosion loading tests were carried out for the uncoated, equal-face coating and back-explosion coating structures with equal surface density and other steel plate thicknesses. Then the polyurea coatings' effects on the antiknock performance of composite structures and their protective mechanism were analyzed in comparison of the failure modes of composite plates. It was found that the anti-explosion performance decreases with the thickening polyurea coating for the composite structure with uniform surface density, while improves under the same steel plate thickness conditions. In addition, coating on the rear surface proves to be the best. It was also shown that the antiknock performance of polyurea-coated steel composite structures is closely related to the characteristics of constitutive dispersion, interface dispersion and softening effect of the polyurea protective coating.