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在所发明的一种基于一级气体炮的高速冲击拉伸试验装置(HSTF)上,于多根纯铜杆件上安装特制夹具,控制试件不同的局部延伸,得到试件不同阶段的实验结果,取得冲击拉伸杆颈缩与断裂“凝固化”了的过程信息,揭示了纯铜试件在冲击拉伸下动态断裂过程的不同阶段.对于回收的纯铜试件,进行了扫描电镜分析.将Ragab提出的在轴对称颈缩区域中心放置特征空穴的简化模型从准静态推广到动态,旨在预测纯铜杆件在冲击拉伸下的局部化颈缩与断裂.
In a high-speed impact tensile testing device (HSTF) based on a gas gun invented, a special clamp is installed on a plurality of pure copper rods to control different local extensions of the test pieces to obtain experiments of different stages of the test pieces As a result, the process information of the necking and rupture of the impact stretch rod was obtained and the different stages of the dynamic fracture process of the pure copper specimen under impact tension were revealed. For the pure copper specimens recovered, Scanning electron microscopy (SEM) analysis. The simplified model proposed by Ragab for feature cavities in the center of the axisymmetric necking region was extended from quasi-static to dynamic in order to predict the localized necking and fracture of pure copper rods under impact tension.