PERFORATION AND PENETRATION OF COMPOSITES

摘要

Perforation and penetration mechanics of metals, rocks, and ceramics are well documented inliterature. However, perforation and penetration mechanics of composites are not quite asdeveloped and is the subject matter of the present study. Penetration of semi-infinite and finitethickness targets usually occurs under high velocity impact exceeding the critical compressivestrength of the material, while perforation is related to finite thickness thin targets and itstension-shear properties. During penetration, there exists a relative velocity between theprojectile and the surrounding target material. This relative velocity is zero during perforationand the material ahead and surrounding the projectile moves together. A finite thickness thicktarget shows four distinct penetration phases, i.e., (i) Penetration or P-Phase, (ii) Transition orT-Phase, (iii) Perforation or F-Phase & (iv) Retraction or R-Phase. With the decrease in targetthickness, the P-Phase disappears and the F-Phase dominates. In this paper, finite elementanalyses will be presented in studying the perforation and penetration behavior of compositelaminates under ballistic impact of a right circular cylinder (RCC) projectile.