Li Dian, He Zichun, Li Mao
College of Naval Architecture and Ocean Engineering, Naval University of Engineering, Wuhan 430033, China.
Naval Academy of Research, Beijing 100161, China.
Polymers (Basel). 2025 Sep 14;17(18):2481. doi: 10.3390/polym17182481.
Experimental investigations were conducted on the polyurea-coated steel plates experiencing localized air blast loads. The blast distance and polyurea coating position on the deformation and failure modes of the polyurea-coated steel plates were compared with those of homogeneous steel plates. The dynamic response failure and stress wave propagation characteristics of the polyurea-coated steel plates were studied. The results showed that under the localized air blast loads, the polyurea-coated steel plates demonstrated three failure modes: large flexural deformation, flexural deformation plus plugging breach, and flexural deformation plus plugging breach plus petal-like cracking. Under the same blast distance and surface density, the deformation and failure modes of the homogeneous steel plate were the same as those of the steel plate or polyurea-coated steel plate, but significantly different from those of the polyurea-coated steel plate. Coating polyurea on the non-blast-facing surface of steel plates exhibited better air blast resistance than coating polyurea on the blast-facing surface. Still, the air blast resistance of the polyurea-coated steel plate was insignificant compared to the homogeneous steel plates of the same weight.
对承受局部空气冲击波载荷的聚脲涂层钢板进行了实验研究。将聚脲涂层钢板的爆炸距离和聚脲涂层位置对其变形和破坏模式的影响与均质钢板进行了比较。研究了聚脲涂层钢板的动态响应破坏和应力波传播特性。结果表明，在局部空气冲击波载荷作用下，聚脲涂层钢板呈现出三种破坏模式：大弯曲变形、弯曲变形加堵塞缺口、弯曲变形加堵塞缺口加花瓣状开裂。在相同的爆炸距离和表面密度下，均质钢板的变形和破坏模式与钢板或聚脲涂层钢板相同，但与聚脲涂层钢板有显著差异。在钢板的非迎爆面涂覆聚脲比在迎爆面涂覆聚脲表现出更好的抗爆性能。然而，与相同重量的均质钢板相比，聚脲涂层钢板的抗爆性能并不显著。
