Abstract
Projectile impact resistance of transparent solid polymer plates and composite panels, have been investigated. The functional form of impact resistance (tolerance), R, with number of sheets, n, in each panel as represented by R= At2 n - Btn + C (with tn = nt, t being unit sheet thickness), has been assigned with appropriate physical processes responsible for failure. Use of nano-particulate reinforced polymeric adhesives exhibits enhanced impact resistance. Evaluation of crack surface energy show rising trend with a number of sheets stacked in each panel. Direct experimental evidence of impact energy dispersion in a conical zone, away from the projectile direction, has been found.
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