ENERGY ABSORPTION AND BALLISTIC LIMIT OF TARGETS STRUCK BY HEAVY PROJECTILE

Authors

  • M. GANESH BABU
  • R. VELMURUGAN
  • N. K. GUPTA

Keywords:

Abstract

IMPACT ON COMPOSITE STRUCTURES WAS A CRITICAL TOPIC WITH GREAT IMPORTANCE IN THE RECENT PAST. IN THIS PAPER, IMPACT ON GLASS/EPOXY AMINATES BY A 558.6 GMS MILD STEEL CYLINDROCONICAL PROJECTILE, IN THE RANGE OF 30 { 100M/S, WAS STUDIED. COMPOSITE PANELS CONSISTING OF 3 AND 5 LAYERS OF 3 TYPES OF GLASS REINFORCEMENT WITH DIFFERENT COMBINATIONS WERE PREPARED VIZ.3 LAYERS OF WRM/EPOXY, CSM/EPOXY, GLASS FABRIC/EPOXY, WRM/CSM/EPOXY, WRM/FABRIC/EPOXY AND CSM/FABRIC/EPOXY LAMINATES. TESTS WERE CONDUCTED TO DETERMINE THE BALLISTIC LIMIT AS WELL AS ENERGY ABSORPTION FOR DI®ERENT INITIAL VELOCITY OF THE PROJECTILE USING A PISTON TYPE, GAS GUN LAUNCHER. A MATHEMATICAL MODEL BASED ON THE ENERGY BALANCE PRINCIPLE WAS PROPOSED TO PREDICT THE BALLISTIC LIMIT. THE WRM/ EPOXY LAMINATES SHOWED HIGHER ENERGY ABSORPTION CAPABILITY AND BETTER BALLISTIC LIMIT WHEREAS CSM/EPOXY SHOWED THE LEAST OF ALL. INCREASE IN ENERGY ABSORPTION WAS NOTED UP TO A CERTAIN LIMIT AND THEN DECREASES SLIGHTLY FOR ALL THE 6 TYPES OF PANELS. THE DELAMINATION AREA INCREASED WITH INCREASE IN INITIAL VELOCITY UP TO BALLISTIC LIMIT AND A SMALL DECREMENT WAS OBSERVED FROM THEREON. THE BALLISTIC LIMIT DETERMINED EXPERIMENTALLY WAS COMPARED WITH THE PROPOSED MODEL AND SHOWED GOOD AGREEMENT WITH THE EXPERIMENTAL VALUE.

Published

2006-03-01

Issue

Section

Articles