PERFORATION CHARACTERISTICS OF METAL TARGET PLATE SUBJECTED TO PELE

Abstract

THE PERFORATION TESTS OF 45 # STEEL TARGET PLATE AND 2A12 ALUMINUM ALLOY TARGET PLATE BY PELE (THE PENETRATOR WITH LATERAL EFFICIENCY) WERE CARRIED OUT IN THIS PAPER TO STUDY THE PERFORATION FAILURE CHARACTERISTICS OF METAL TARGET PLATE SUBJECTED TO PELE. IN THE EXPERIMENT, THE WATER TANK WAS USED TO COLLECT THE PLUGS FORMED BY THE IMPACT FAILURE OF THE TARGET PLATE. THE MACROSCOPICAL MORPHOLOGY OF PERFORATION ON THE TARGET PLATE AND THE PLUG WERE OBSERVED, AND THE PERFORATION WALL WAS CUT AND POLISHED TO OBSERVE THE DISTRIBUTION AND TREND OF THE CRACKS IN THE PERFORATION WALL BY SCANNING ELECTRON MICROSCOPY (SEM) AND METALLOGRAPHIC MICROSCOPY. THE MAGNITUDE AND DIRECTION OF THE FORCE PRODUCED BY PELE ON THE TARGET DURING PENETRATION WERE CALCULATED BY NUMERICAL SIMULATION, AND THE FAILURE MECHANISM OF 45# STEEL TARGET PLATE AND 2A12 ALUMINUM ALLOY TARGET PLATE UNDER PELE WAS REVEALED. THE EXPERIMENTAL AND NUMERICAL RESULTS SHOW THAT THE PERFORATION FAILURE OF THE METAL TARGET PLATE BY PELE IS A NEW FORM, WHICH IS DIFFERENT FROM THE DUCTILE PERFORATION BY THE CONICAL-NOSED PROJECTILE AND THE PUNCHING FAILURE BY THE FLAT-NOSED PROJECTILE. THE LONGITUDINAL CROSS-SECTION OF THE PERFORATION ON THE TARGET PLATE IS FUNNEL-SHAPED. THE SHAPE OF THE PLUG FORMED BY 45 # STEEL TARGET PLATE AND 2A12 ALUMINUM ALLOY TARGET PLATE SUBJECTED TO PELE IS LIKE A CIRCULAR TRUNCATED CONE, WHICH IS OBVIOUSLY DIFFERENT FROM THE CYLINDRICAL PLUG FORMED FROM THE METAL TARGET PLATE IMPACTED BY THE ORDINARY FLAT-NOSED PROJECTILE. IN THE PROCESS OF PENETRATING THE TARGET PLATE, THE EXPANSION OF THE FILLING CAUSES THE PROJECTILE JACKET TO EXERT A FORCE WITH A CERTAIN ANGLE TO THE DIRECTION OF PROJECTILE MOVEMENT ON THE TARGET PLATE, WHICH IS THE MAIN REASON FOR THE FUNNEL-SHAPED PERFORATION ON THE TARGET PLATE AND THE CIRCULAR TRUNCATED CONE-SHAPED PLUG.