【摘要】 研究了在爆炸载荷作用下,50 SiMnVB钢圆筒自然破碎和高能束改性破碎后,破片拉伸和剪切断口在整个断面上的比例所发生的变化规律,表明采用高能束局部改性技术可以实现脆性材料圆筒断裂方式的转化。试验中还观察到在拉伸断口应力方向的断面上出现了熔化现象,这说明在拉伸断裂区局部存在着剪切现象,同时证明采用高能束改性后圆筒在爆炸载荷作用下可产生全壁厚剪切断裂。更多还原

【Abstract】 The fragment ratio of tension and shear fracture of 50SiMnVB cylinder shell under explosive load is investigated. It shows that the fracture pattern of brittle material can be changed by high - energy - beam local modified technique. Melting phenomenon observed in the stress direction of tensile fracture illustrates the existence of local shear. It is proved that high - energy - beam local modified technique contributes to full wall shear fracture under explosive load.更多还原