Abstract Aluminum alloy high-speed material behavior should be comprehensively characterized for the application of a high-speed forming process. The current high-speed material testing methods are not conducive to large-scale applications because of their high cost and difficulty. In this paper, a new method for testing the high-speed performance of aluminum alloy based on electromagnetic driving was proposed. A specially designed tool was used to convert bulging deformation to tensile deformation. Two high-speed cameras and a digital image correlation (DIC) system were used to measure the stress–strain relationship of the sample. Based on the stress wave theory, a stress measurement method using two-point measurement was proposed. A numerical model was established, and the model was in good agreement with the experiment. Tests with strain rate ranging from 1000 to 3100 s−1 were conducted, and stress–strain curves were measured. The results matched those obtained with traditional test methods.

中文翻译：

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测试铝合金高应变率拉伸行为的新方法

摘要 铝合金高速材料行为应综合表征高速成形工艺的应用。目前的高速材料检测方法成本高、难度大，不利于大规模应用。本文提出了一种基于电磁驱动的铝合金高速性能测试新方法。使用专门设计的工具将膨胀变形转换为拉伸变形。两个高速相机和一个数字图像相关（DIC）系统用于测量样品的应力-应变关系。基于应力波理论，提出了一种基于两点测量的应力测量方法。建立了数值模型，模型与实验吻合较好。进行了应变速率范围为 1000 到 3100 s-1 的测试，并测量了应力-应变曲线。结果与使用传统测试方法获得的结果相匹配。