|
Determination of main parameters of jet penetration into the homogenous steel obstacle
Marinko Ugrčić Miroljub Vukašinović
The theoretical and experimental determinations of kinematic and dynamic parameters of the shaped charge jet necessary to analyze the process of jet penetration have been realized. The procedure of the experimental determination of jet penetration velocities is given as well as the critical jet velocity during the penetration into the homogenous obstacle. The procedure is based on the use of the logic analyzer and special captures to record the discrete data of the curve - the penetration length depending on time. A polynomial form of that mathematically fitted functional curve gives the possibility to determine the critical jet penetration velocity. Also, the results of the experimental determination of the penetration velocities of the copper shaped charge jet during the penetration into the homogenous steel obstacle are shown. The use of these results, obtained by the given procedure, in the program code for a numerical simulation of the shaped charge function and jet penetration, enables a more accurate calculation of jet kinematic and dynamic parameters (velocities, contact pressures, etc.) and penetrability in to obstacles of different mechanical properties.
Key words: physics of explosion, shaped charge, jet penetration, critical velocity, contact pressure. |