Research and Optimization of Anti-Ballistic Properties of Gradient Honeycomb Sandwich Panels

Abstract In addressing the penetration resistance of honeycomb sandwich panels, a finite element model is established to simulate the penetration problem. The relationship between initial and residual velocity of the fragments is studied. The effects of angle gradient, height gradient, and thickness gradient structures on the ballistic performance of honeycomb sandwich panels are analyzed. Multi-objective optimization design of honeycomb sandwich panels is conducted, resulting in a thickness gradient honeycomb sandwich panel. The results show that the relationship curve between initial and residual velocities of fragments closely matches the theoretical formula. Different gradient structures exhibit varied protective effects on the honeycomb sandwich panels. Compared to the pre-optimized panels, the optimized thickness gradient honeycomb sandwich panels show a significant improvement in protection, with the residual velocity of fragments reduced by 31.82% and the total mass of the sandwich panel reduced by 16.23%.