The present study aims to elaborate the influence of bending prestrain, pressure, and sheet thickness on the forming behavior of AA 5052-H32 sheets deformed at a high velocity using a shock tube. The forming parameters, including the dome height, strain evolution, effective strain, and stress distribution, are evaluated through shock tube experiments and finite element simulations in DEFORM-3D; the numerical and experimental results are compared for validation. The rate-dependent material properties from both the prestrained sheets and the shock-deformed sheets are incorporated into the simulations. The forming process is modeled in a single step without considering prestrain application. Instead, the mechanical properties obtained from the actual prestrained sheets are provided as input to the numerical models before forming. The sharp increase in strain evolution matches quite well with the experimental results obtained by the strain rosette. This agreement confirms the strain rate of the sheet during the forming process. Circular grids are printed on the sheets, and Hill’s yield criterion is used to calculate the effective strain. Moreover, Hollomon’s power law is used to calculate the effective stress in the same location. The simulated effective stress and strain distribution matches quite well with the experimental results with a slight overprediction. The distribution of the stress and strain confirms the uniform stretching of the material without strain localization. The variation in the forming parameters indicates that the forming behavior is dependent on the degree of prestrain, and the forming parameters increase monotonically with the increase in pressure.

本研究旨在阐述弯曲预应变，压力和板厚对使用冲击管高速变形的AA 5052-H32板的成形行为的影响。通过冲击波实验和DEFORM-3D中的有限元模拟来评估成形参数，包括穹顶高度，应变演变，有效应变和应力分布。比较数值和实验结果以进行验证。来自预应变薄板和冲击变形薄板的与速率有关的材料特性被纳入模拟中。成型过程只需一步即可建模，无需考虑预应变的应用。取而代之的是，将从实际的预应变薄板获得的机械性能作为成形之前的数值模型的输入。菌株进化的急剧增加与通过玫瑰花结获得的实验结果非常吻合。该协议确定了片材在成形过程中的应变率。圆形网格被打印在纸张上，希尔的屈服准则被用来计算有效应变。此外，霍洛蒙的幂定律用于计算相同位置的有效应力。模拟的有效应力和应变分布与实验结果非常吻合，但略有过度预测。应力和应变的分布证实了材料的均匀拉伸而没有应变局部化。成形参数的变化表明，成形行为取决于预应变的程度，并且成形参数随压力的增加而单调增加。