Three-dimensional simulations of impact induced damage in composite structures using the parallelized SPH method

To address the strain-rate dependent behavior of unidirectional composites in Air Force and Navy military systems subjected to impact loading, a one-parameter visco-plasticity composite material model was developed and incorporated into the MAGI code which was parallelized for this study. This code is based on the smoothed particle hydrodynamics method. The strain-rate dependent composite model is applied here to investigate the high-velocity impact induced damage of armored composite plates which consisted of eight graphite/epoxy (Gr/Ep) layers with a lay-up of [±45/0/90] s . The face sheets consisted of two different materials (either aluminum or boron carbide) of variable thickness. The effects of face sheet position, face sheet material types, and impact velocity on the detailed damage of the laminate are presented.

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