Research progress on anti-explosion performance and optimization design methods of sandwich panels in multiple explosion scenarios

High-strength homogeneous metal structures, high-performance fiber composite structures, cellular sandwich panels, especially sandwich panels, exhibit excellent energy absorption matching characteristics by synergistically dissipating shock wave energy through core plastic deformation and panel bending and stretching, and have been widely used in the field of anti-explosion. Sandwich panels are an important way to achieve lightweight and high anti-explosion performance, but the relationship between the anti-explosion performance of sandwich panels and their material properties remains unclear, and there is a lack of research on the material failure mechanisms of sandwich panels. The lack of multi factor collaborative analysis leads to limitations in the conclusions, which restricts the optimization and matching of structure and material properties. The results show that the core characteristics, core combination, the thickness of the core and the front face sheet, the strength and stiffness of the structure, and the interfacial bond performance are the main internal factors affecting the dynamic response and anti-explosion performance of the sandwich panels. And the interfacial bond performance has a great influence on the anti-explosion performance. In the future, it is necessary to deeply explore the mechanism of material mechanical properties and structural failure response in energy absorption, combine innovative design methods, such as gradient design and multi-scale optimization, develop interdisciplinary collaborative optimization technologies, and develop lightweight and high anti-explosion sandwich panels.