Similarity Analysis And Characteristics Of Partial Penetration During Projectiles Impacting Metal Targets

Partial embedment of projectile into metal target is one of modes of interaction of projectile impacting target. Particular effects could be realized by the partial penetration of projectile. Based on the dimensional theory, low-velocity gas gun experiments, material microscopic experiments and numerical simulation methods, similarity of partial penetration of projectile onto metal targets and characteristics of partial penetration were carried out..Based on dimensional theory, gained partial penetration ballistic characteristics of the main control parameters, and the projectile penetration location parameters such as similarity criterion, and to determine the geometric scale ratio and the similar material simulation required to meet the conditions of similarity; According to the elastic characteristics of target material and target function conditions, the proposed similar geometric scale ratio model and materials testing scheme.Verified by partial penetration of gas gun experiments, the geometry and the similar material simulation. Aluminium projectile and steel projectile partial penetrating aluminum plate, geometry of scale ratio and the similar material model test, can realize the normal partial penetration, different geometric model than with the similar material simulation test data error is less than 5%. Test results show that the typical warhead grooves can effectively into a target board, plastic deformation, the target material form of the projectile rebound resistance; Plastic deformation capacity and impact toughness of target materials directly affects the warhead the slots and structure of the joint degrees, as well as the damage of target and the formation of cracks. Through the numerical simulation of the dynamic role play target partial penetration study, based on check with test results, further to big target of high strength steel penetration Gao Ren modulus ratio and geometric conditions and conditions of the similar material simulation is verified; The bomb target partial penetration effect of time evolution characteristics, based on the experimental and simulation data, obtained the projectile partial penetration position with dimensionless velocity change empirical formula.Based on the microscopic characteristics of target analysis, the next target impacted by a target dynamic material flow deformation failure and different deformation conditions of target material flow’s influence on the cut set, the warhead groove structure, play the influence law of speed against partial penetration, as the impact velocity increasing deformation area of target, target material damage accumulation, easy to cause the grooves in the material fracture; And get the groove structure on the influence law of target material damage failure.