【摘要】 对薄壁软钢圆管在 90°圆锥头子弹正冲击和斜冲击下的破裂进行了实验研究 .测量了子弹以不同冲击角冲击时 ,圆管产生穿透性破裂的最小速度 (临界破裂速度 ) ,找出管壁在不同冲击角下局部破裂的模式 .在子弹以临界破裂速度正冲击下 ,靶壁逐渐覆盖整个弹头 ,管壁的最后破裂是剪切型的 ;当斜冲击角为 30°时 ,子弹的尖端会刺透靶壁 ,在这些斜冲击角下 ,子弹的临界破裂动能仅仅是正冲击下的 4 5% .更多还原

【Abstract】 Impact tests at both normal and oblique angles of incidence are conducted on thin mild steel tubes using a moderate size of 90° conical nosed missiles. The minimum impact speed at which cracks through the thickness of the wall are generated, termed the speed for rupture, is measured, and various modes of rupture are identified. For a thin tube hit by a missile at a normal angle of obliquity at the speed for rupture, the contact region spreads across the nose of the missle, and the transverse shear deformation is predominant in the final failure process. If the angle of obliquity is 30°, the missile pierces a hole through the wall of the tube. At the speed for rupture, the kinetic energy of the missile for oblique angle 30° is only about 45% of that required for plugging at a normal angle of obliquity.更多还原