Ricochet Effect of Shaped Charge Jet under Large Normal Angle Condition

At present, there is a lack of systematic research on the shaped charge jet penetration under large normal angle condition, especially the special phenomenon of jet ricochet.Three ricochet models, including Tate model, Rosenberg model and compressible fluid-mechanics model, were comparatively analyzed, and the experiments of jet penetration into steel and aluminum targets were also conducted.Theoretical analysis shows that the compressible fluid-mechanics model is the best one to predict the rebounding angle.The experiment results indicate that under large normal angle condition, the penetration depth decreases with the increase of normal angle, and the vertical penetration depth is just about ten percents of that of normal penetration.When the velocity of shaped charge jet head is 6 800 m/s, the ricochet angle is between 6° and 7° for 603 armor steel and between 5° and 6° for aluminum.