The effect of polyurea coating on the structural response of metallic plates is still a challenge for the industry and scientific community. In this paper, experimental and numerical investigations were carried out to study the influence of polyurea coating as a strengthening layer on the dynamic plastic response and resistance of aluminum plates under gas detonation load. A single-stage Gas Detonation Forming (GDF) apparatus was used to conduct a number of experiments on rectangular aluminum plates with and without polyurea coating sprayed onto the rear side of the metallic plate. The residual deformations of polyurea-coated aluminum (PU–Al) plates were measured and compared with single-layer aluminum plates with the same areal density. It was found that the central permanent deflection of metallic plates decreased significantly with the use of coatings, and PU-Al configurations had superior performance compared to uncoated aluminum plates, which was more pronounced at higher total pre-detonation pressures. Additionally, an empirical equation based on dimensionless numbers was presented to predict the central permanent deflection of PU-Al configurations. Furthermore, the Response Surface Methodology (RSM) was used to establish a relationship between the output response and input independent parameters based on ANOVA results, and to understand the interaction between parameters. Eventually, a single-objective optimization analysis was carried out using the RS equation to find optimum ranges of input variables that can minimize the response. The optimization results were validated by conducting new experiments.

聚脲涂层对金属板结构响应的影响仍然是工业和科学界的挑战。本文通过实验和数值研究，研究了聚脲涂层作为强化层对气体爆炸载荷下铝板动态塑性响应和抗力的影响。使用单级气体爆震成形（GDF）设备在矩形铝板上进行了多个实验，在矩形铝板上有和没有在金属板的背面喷涂聚脲涂层。测量了聚脲涂层铝（PU–Al）板的残余变形，并将其与具有相同面密度的单层铝板进行了比较。已经发现，金属金属板的中心永久挠度随着涂层的使用而显着降低，并且与未涂覆的铝板相比，PU-Al构型具有更好的性能，这在较高的总起爆压力下更为明显。此外，提出了基于无量纲数的经验方程式，以预测PU-Al构型的中心永久挠度。此外，使用响应面方法（RSM）基于ANOVA结果建立输出响应与输入独立参数之间的关系，并了解参数之间的相互作用。最终，使用RS方程进行了单目标优化分析，以找到可以使响应最小化的输入变量的最佳范围。