Abstract

The high-rate convergence of copper cylindrical shells with a diameter of 48 mm and a wall thickness of 4 mm is studied at various intensities of explosive loading. Two structural mechanisms of the loss of stability of the radial deformation front are described. A diagram of structural changes reflecting the successive stages of the convergence process is presented. An interrelation is found between the number of protrusions on the shell surfaces during their corrugation at the intensity of explosive loading. It was found that high-rate longitudinal deformation during convergence has a pulsating character. It was found that the temperature rises to ~500°С in the center of the converged shell and that it can be higher than 1000°С at a high rate of spall-pore collapse.

中文翻译：

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不同爆炸载荷强度下圆柱形铜壳收敛的金相研究

摘要

研究了直径为 48 mm、壁厚为 4 mm 的铜圆柱壳在不同爆炸载荷强度下的高速收敛。描述了径向变形前沿失去稳定性的两种结构机制。展示了反映收敛过程的连续阶段的结构变化图。在爆炸载荷的强度下，壳表面上的突起数量之间存在相互关系。发现收敛过程中的高速纵向变形具有脉动特征。发现会聚壳中心的温度升至~500°С，并且在高剥落孔坍塌率下可以高于1000°С。