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采用弹道实验和数值模拟的方法研究了带环形预裂槽的金属靶在射弹冲击下的毁伤模式和防护性能,分析了弹头形状、预裂槽直径及深度等因素对靶板防护性能的影响。结果表明:对带有环形预裂槽的金属靶板,存在两种主要毁伤模式,即环形槽内部的侵彻和环形槽底的冲击断裂;临界毁伤速度与毁伤模式密切相关,随着环形槽深度的增大或半径的变小,临界毁伤速度变小;与尖头弹相比,平头弹的临界毁伤速度更小;微观分析表明,在射弹冲击作用下,环形槽底部产生绝热剪切带,更容易形成充塞剪切破坏。
The ballistic test and numerical simulation method were used to study the damage mode and the protective performance of the metal target with the annular pre-fracture under the impact of the projectile. The influence of the shape of the projectile, the diameter and depth of the pre-groove on the protective performance of the target plate was analyzed . The results show that there are two main modes of damage to the metal target with annular pre-fracture: the penetration inside the annular groove and the impact fracture at the bottom of the annular groove; the critical damage velocity is closely related to the damage mode. With the annular groove The critical damage speed becomes smaller when the depth increases or the radius decreases, and the critical damage speed of the blunt-ended bombs is smaller than that of the pointed bombs. The microscopic analysis shows that under the impact of the projectile, adiabatic shear occurs at the bottom of the annular groove Belt, easier to form stuffed shear damage.