In this study, the anti-penetration performance of polyurea/ASTM1405-steel composite plate subjected to high velocity projectile was analyzed. Two kinds of modified polyurea material (AMMT-053 and AMMT-055) were selected and a ballistic impact testing system including speed measuring target system and high-speed camera was designed. This experiment was conducted with a rifle and 5.8 mm projectile to explore the effects by the polyurea coating thickness, the polyurea coating position and the glass-fiber cloth on the anti-penetration performance of polyurea/ASTM1405-steel composite plate. The result showed that the effects of polyurea coating position were different between two types of polyurea, and that the effects of glass-fiber position were disparate between two types of polyurea as well. For AMMT-053 polyurea material, it was better to be on front face than on rear face; whereas for AMMT-055 polyurea, it was better to be on rear surface although the difference was very subtle. Additionally, formulas had been given to describe the relationship between the effectiveness of polyurea and the thickness of polyurea coating. In general, AMMT-055 had better anti-penetration performance than AMMT-053. Furthermore, five typical damage modes including self-healing, crack, local bulge, spallation and local fragmentation were defined and the failure mechanism was analyzed with the results of SHPB test. Additionally, the bonding strength played an important role in the anti-penetration performance of polyurea/steel composite plate.

本研究分析了聚脲/ASTM1405-钢复合板在高速弹丸作用下的抗穿透性能。选用AMMT-053和AMMT-055两种改性聚脲材料，设计了包括测速靶系统和高速摄像机在内的弹道冲击试验系统。本实验采用步枪和5.8mm弹丸进行，探讨聚脲涂层厚度、聚脲涂层位置和玻璃纤维布对聚脲/ASTM1405-钢复合板抗渗透性能的影响。结果表明，两种聚脲对聚脲涂层位置的影响不同，两种聚脲对玻璃纤维位置的影响也不同。对于 AMMT-053 聚脲材料，正面比背面好；而对于 AMMT-055 聚脲，尽管差异非常细微，但最好在背面。此外，还给出了描述聚脲有效性与聚脲涂层厚度之间关系的公式。总的来说，AMMT-055 的抗渗透性能优于 AMMT-053。进一步定义了自愈、裂纹、局部鼓包、剥落和局部碎裂5种典型损伤模式，并结合SHPB试验结果分析了破坏机理。此外，结合强度对聚脲/钢复合板的抗渗透性能也起着重要作用。此外，还给出了描述聚脲有效性与聚脲涂层厚度之间关系的公式。总的来说，AMMT-055 的抗渗透性能优于 AMMT-053。进一步定义了自愈、裂纹、局部鼓包、剥落和局部碎裂5种典型损伤模式，并结合SHPB试验结果分析了破坏机理。此外，结合强度对聚脲/钢复合板的抗渗透性能也起着重要作用。此外，还给出了描述聚脲有效性与聚脲涂层厚度之间关系的公式。总的来说，AMMT-055 的抗渗透性能优于 AMMT-053。进一步定义了自愈、裂纹、局部鼓包、剥落和局部碎裂5种典型损伤模式，并结合SHPB试验结果分析了破坏机理。此外，结合强度对聚脲/钢复合板的抗渗透性能也起着重要作用。定义了散裂和局部碎裂，并结合SHPB试验结果分析了失效机理。此外，结合强度对聚脲/钢复合板的抗渗透性能也起着重要作用。定义了散裂和局部碎裂，并结合SHPB试验结果分析了失效机理。此外，结合强度对聚脲/钢复合板的抗渗透性能也起着重要作用。