“…Extensive theoretical and experimental research has been conducted in order to establish the basis for the design of selected structures (Awerbush, and Bonder, 1974;Beckman and Goldsmith, 1978;Corbett et al, 1997; _____________________________________________ *Corresponding author E-mail:azhari_n@yahoo.com Corbett and Reid, 1993;Corran et al, 1983;Jones and Shen, 1993;Langsen, and Larson, 1990;Shen, and Jones, 1993;Wen and Jones, 1993;Wen and Jones, 1994;). However, more experimental, theoretical as well as numerical research is still needed for the study of plastic collapse mechanisms of targets against projectiles.…”