Iranian Scientific Association of Energetic Materials

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The aim of this study is to investigate the influence of fiber stacking sequence on the penetration and perforation of glass/epoxy composite hat shapes under high velocity impact loading by projectile with semi-spherical nose shape with three different initial velocities using numerical and experimental methods. Four layered unidirectional (UD) E-glass fiber/polyester resin was used to construct laminates. The length of the composite targets was 100mm and the thickness was 3mm. Result shows good correlation between numerical and experimental energy absorptions. The numerical model was developed using ABAQUS software and experiments were carried out using a gas gun device at 123, 150 and 170 m/s. The optimized correlation between numerical and experimental results is associated with [-30/30/45/-45] fiber stacking configuration with 3.54% accuracy in 170 m/s initial velocity, and the worst correlation was between experimental and the model is related to [-75/-60/75/60] fiber stacking configuration with 21.96% accuracy in 170 m/s initial velocity. Generally considering the constant mechanical properties and dimensions in numerical model may be regarded as the reason for the difference between numerical and experimental results.

Keywords: Projectile penetration, Composite, Fiber stacking sequence, Numerical model, Experiment

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