This study aimed to explore the anti-blast performances of 6063-T5 aluminum alloy circular tubes coated with polyurea. First, quasi-static and dynamic mechanical performance experiments of AP103-type polyurea were carried out, and the basic mechanical parameters of AP103 type polyurea were obtained. The results showed that this type of polyurea has significant super-elastic characteristics at low strain rates, and it underwent yield slip and strain hardening at high strain rates. On this basis, anti-blast performance tests were conducted on 6063-T5 aluminum alloy circular tubes with different thicknesses of polyurea coatings, and the typical damage modes were summarized. The results showed that the anti-blast performances of the polyurea-coated aluminum alloy circular tubes significantly improved in terms of the degree of local deformation and the cross-sectional area. The energy change of the polyurea coating and the transmission of stress waves obtained from the numerical simulations revealed the anti-blast mechanism of the polyurea-coated aluminum alloy circular tubes. An engineering calculation formula for the thickness of the polyurea layer and the degree of local deformation of the aluminum alloy circular tubes was finally established.

本研究旨在探讨6063-T5铝合金聚脲涂层圆形管的抗爆性能。首先，进行了AP103型聚脲的准静态和动态力学性能试验，得到了AP103型聚脲的基本力学参数。结果表明，这种类型的聚脲在低应变速率下具有显着的超弹性特征，并且在高应变速率下经历了屈服滑动和应变硬化。在此基础上，对不同厚度的聚脲涂层的6063-T5铝合金圆管进行了防爆性能测试，总结了典型的破坏方式。结果表明，就局部变形程度和横截面积而言，聚脲涂层铝合金圆管的抗爆性能显着提高。数值模拟得到的聚脲涂层的能量变化和应力波的传输揭示了聚脲涂层铝合金圆管的抗爆炸机理。最终建立了聚脲层厚度和铝合金圆管局部变形程度的工程计算公式。