This work investigated how the incidence angle of the electron beam affects the dynamic fracture of metallic cylinder shell. Cylinder shell made of steel was blazed with electron beam and cut into ring and cylinder specimens. Flash X-ray radiography was used to register the fracture of the ring specimen. Fragments from the cylinder specimens under internal explosive loading were recovered and analyzed by SEM, and the fragment mass distribution was derived by statistical analysis. When the incident angle α of the electron beam was 0°, the fracture of the metal ring was along the normal direction of the outer surface. When α was 30° and 45°, the fracture of the metal ring was oblique. The distributions of recovered fragments were similar regardless of α. The fracture of the metallic cylinder shell under explosive loading was well controlled at all α. The recovered fragments from the cylinder specimen with α = 30° or 45° had an oblique quadrangular prism shape, whose the length was 30% larger than the fragments from the cylinder specimen with α = 0°. The fracture near the outer side of the cylinder specimen was along the melting region of the electron beam. The fracture mode of the cylinder specimen was tension-shear mixed fracture when α = 0° but shear fracture when α = 30° or 45°.

这项工作研究了电子束的入射角如何影响金属圆柱壳的动态断裂。将钢制的圆柱壳用电子束燃烧，然后切成环形和圆柱状样品。X射线X射线照相术用于记录环形试样的断裂。回收内部爆炸载荷下圆柱试样的碎片，并用SEM分析，并通过统计分析得出碎片质量分布。当电子束的入射角α为0°时，金属环的断裂沿着外表面的​​法线方向。当α为30°和45°时，金属环的断裂是倾斜的。无论α如何，回收碎片的分布都是相似的。炸药载荷下金属圆柱壳的断裂在所有α下都得到了很好的控制。从圆柱体样品（α= 30°或45°）回收的碎片呈斜四棱柱形，其长度比从圆柱体样品（α= 0°）的碎片大30％。圆柱体样品外侧附近的断裂是沿着电子束的熔化区域。圆柱试样的断裂模式在α= 0°时为拉伸-剪切混合断裂，而在α= 30°或45°时为剪切断裂。