HIGH-VELOCITY PENETRATION OF CONCRETE TARGETS WITH THREE TYPES OF PROJECTILES: EXPERIMENTS AND ANALYSIS

IN THIS STUDY, HIGH-VELOCITY PENETRATION EXPERIMENTS WERE CONDUCTED USING CONVENTIONAL OGIVE-NOSE, DOUBLE-OGIVE-NOSE, AND GROOVED-TAPERED PROJECTILES OF APPROXIMATELY 2.5 KG AND INITIAL VELOCITIES BETWEEN 1000 AND 1360M/S TO PENETRATE OR PERFORATE CONCRETE TARGETS WITH UNCONFINED COMPRESSIVE STRENGTHS OF NOMINALLY 40MPA.THE PENETRATION PERFORMANCE DATA OF THESE THREE TYPES OF PROJECTILES WITH TWO DIFFERENT TYPES OF MATERIALS (I.E., AERMET100 AND DT300) WERE OBTAINED. THE CRATER DEPTH MODEL CONSIDERING BOTH THE PROJECTILE MASS AND VELOCITY WAS PROPOSED BASED ON THE TEST RESULTS AND A THEORETICAL ANALYSIS. THE PENETRATION ABILITY AND THE TRAJECTORY STABILITY OF THESE THREE PROJECTILE TYPES WERE COMPARED AND ANALYZED ACCORDINGLY. THE RESULTS SHOWED THAT CONSIDERING THE PROJECTILE MASS AND VELOCITY IS NECESSARY TO PREDICT THE CRATER DEPTH. MOREOVER, THE NEW MODEL ESTABLISHED IN THIS STUDY WAS RELIABLE. THE DOUBLE-OGIVE-NOSE PROJECTILE HAD A HIGHER PENETRATION ABILITY THAN THE CONVENTIONAL OGIVE-NOSE PROJECTILE. MEANWHILE, THE GROOVED-TAPERED PROJECTILE HAD A BETTER TRAJECTORY STABILITY.