球形破片对带软质防护明胶靶标侵彻机制研究

为揭示球形破片侵彻带软质防护明胶靶标的作用过程和机理,对球形破片侵彻带软质防护的弹道明胶进行了仿真与试验研究.结果表明：在球形破片撞击带纤维软防护明胶靶标瞬间,明胶的凹陷速度有个迅速的上升过程,在此期间钢球速度迅速衰减,防护层的破坏主要是以剪切破坏为主;随着钢球速度的不断减小,防护层纤维的拉伸变形越来越明显,钢球的动能开始大量转化为防护层的弹性势能,防护层的破坏主要是以拉伸破坏为主;防护层在未被击穿情况下,仍有明显的"背凸"现象,在明胶内部产生了典型的压力波效应,距明胶前表面40 mm处峰值压力在3.53 MPa左右,仍可对人体器官造成一定损伤.

Study on Mechanism of Spherical Fragments Penetrating Into Ballistic Gelatin with Soft Fiber Protection

To reveal the interaction process and mechanism of spherical fragment penetrating a gelatin target with soft fiber protection, the penetration process of spherical fragment to the ballistic gelatin target with soft fiber protection was simulated using an FAE method, and the feasibility of the simulation method was verified via experiment. The result shows that the velocity of gelatin sinking rises rapidly, while the velocity of steel sphere slows down quickly as the steel sphere impacts the soft fiber protection. Meanwhile the main failure mode of soft fiber is shearing mode. With the decrease of the velocity of steel sphere, the tensile deformation of soft fiber becomes more obvious, kinetic energy of steel sphere is converted to potential energy of fiber shells and the failure mode turns into tensile mode. Although the soft armor doesn''t break, the back of fiber becomes protruding. With spreading of pressure wave, the gelatin depresses slightly,and the peak pressure is up to 3.53 MPa at 40 mm inside the gelatin, which still can cause certain damage to human organs.