Southwest Research Institute® (SwRI®) and Albany Engineered Composites® (AEC®) have partnered to generate a reliable computer model for ballistic impact on carbon fiber composites. Panels of 2-D unidirectional and 3-D woven composites were manufactured and specimens machined to perform a suite of material tests on standalone resin and composite: low and high-rate tension, torsion, delamination, compression, etc. Additionally, ballistic tests were performed with .30-in caliber fragment simulating projectiles impacting yarns and composite panels. Stereo high-speed video was used in conjunction with digital image correlation to produce panel deflection vs. time. Ultra-high-speed photography was simultaneously recording images every few microseconds to produce more detailed images of the pyramid evolution on the back of the target.
All these tests provide extensive data on how the resin and carbon fiber composite materials behave at low and high rates. A similar procedure was followed in the past to generate S-2 glass, Kevlar and polyethylene composite materials. The computer mesoscale model is generated using the material tests and then validated using the deflection history and ballistic limit from the ballistic tests.
In this conference the material and ballistic test results will be summarized and compared to the mesoscale computer model generated with LS-DYNA.