BALLISTIC IMPACT DAMAGE MODELING ANDEXPERIMENTAL VALIDATION ON A 3-D ORTHOGONALWEAVE FABRIC COMPOSITE

摘要

Numerical simulation of ballistic impact, damage and penetration of a single layer 3-Drnorthogonal weave fabric composite is performed. A Unit Cell Model (UCM) of the composite isrndeveloped using fabric design and processing parameters, as well as control measurements takenrnon the preform and the composite laminate. Two 3-D finite element discretization meshesrn("coarse" and "fine") of the composite UCM are employed in the study of ballistic impact andrnpenetration. The resin-impregnated warp, fill and Z yarns are modeled as unidirectionalrncomposites and the interstitial resin pockets are modeled as an elastic-plastic continuum. Explicitrnfinite element analysis is performed to compute the residual velocity of a rigid projectilernpenetrating the composite UCM using LS-Dyna 970 finite element code. The predicted values ofrnresidual velocity are used to construct the RV ～ IV (residual vs. incident impact velocity) plot.rnNumerical simulation results are validated by ballistic test data obtained in experimentsrnperformed for flat 190oz/yd 2 3-D weave composite panel exposed to 12 shots of 0.22 cal steelrnright circular cylinder (RCC) projectile. A reasonable agreement between theoretical andrnexperimental results is obtained, and a comprehensive discussion of observed discrepancies isrnpresented. A QS-PST model of ballistic penetration is used to predict the ballistic limit.