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利用穿甲燃烧弹撞击不同抗拉强度的40CrNi2Mo钢板,观察了弹坑周围绝热剪切带出现的位置和扩展方向,测量了弹坑剖面上绝热剪切带的总长度,分析了绝热剪切带与冲塞破坏的关系。按照扩展方向和出现位置的不同可以将钢板中的绝热剪切带划分为E型和P型,前者主要分布在合格损伤弹坑的剖面,基本沿着金属塑性变形流线向钢板正面扩展,不会直接引发冲塞破坏。后者主要分布在即将发生冲塞的钢板中,基本垂直于金属塑性变形流线向钢板背面扩展,它的出现表明钢板处于冲塞破坏的临界状态。
By using the armor-piercing combustion projectile impacting 40CrNi2Mo steel plates with different tensile strengths, the advent of adiabatic shear bands around the crater is observed. The total length of the adiabatic shear bands along the crater is measured. Broken relationship. The adiabatic shear bands in the steel plate can be divided into E-type and P-type according to the direction of expansion and the position where they appear. The former is mainly distributed in the section of qualified craters and basically extends to the front of the steel plate along the flow lines of metal plastic deformation, Direct trigger plug damage. The latter is mainly distributed in the impending steel plate, extending to the back of the steel plate substantially perpendicular to the flow line of the plastic deformation of metal, and its appearance indicates that the steel plate is in the critical state of capping failure.