In order to obtain the residual velocity and fracture characteristics of 12.7 mm armor piercing incendiary(API)penetrating 30CrMnSi steel plates,experimental studies on the penetration of 12.7 mm API into 30CrMnSi targets of different thicknesses were carried out.The velocity of the projectile before and after penetrating the target was measured using laser velocimetry and velocimetry targets,and the ultimate penetration depth of the 12.7 mm API into the 30CrMnSi target plate was obtained by changing the target thickness.In addition,LS-DYNA dynamics software was used to study the process of 12.7 mm API penetration into the 30CrMnSi target plate by numerical simulation method combined with FEM mesh and SPH particles.The penetration depth,residual velocity of bullets and ballistic limit of the target plates with different thickness were calculated theoretically by the theory of armor penetration mechanics.The results show that the length of the residual bullet increases with the increase of the thickness of the target plate;the erosion area of the bullet moves gradually from the body part to the tail;the elastic area of the bullet expands gradually.With the increase of the thickness of the target plate,the ballistic limit of the target plate also increases,and the residual velocity of the bullet after penetration gradually decreases.According to the theoretical calculation,the theoretical penetration depth of the 12.7 mm API on the 30CrMnSi target plate is about 27.7 mm,which is consistent with the experimental result.
万方数据
