Static and dynamic properties of star-shaped honeycomb sandwich panels

Abstract

The star-shaped concave structure material is a new type of negative Poisson’s ratio material, which combines the advantages of negative Poisson’s ratio material and honeycomb material. The negative Poisson’s ratio structure has very good mechanical properties, such as bearing capacity, impact resistance, and shear resistance. The honeycomb sandwich panel is a typical lightweight material with high specific strength, specific stiffness, and good energy absorption characteristics. In this paper, the star-shaped concave structure is used as the core layer of the sandwich panel, and the advantages of both the honeycomb sandwich panel and negative Poisson’s ratio structure are combined to make a star-shaped honeycomb sandwich panel. In order to analyze the properties of this material, we use the finite element numerical simulation method to study the effects of several geometric parameters (element thickness, beam width, beam length, and star angle) on the bending stiffness, buckling critical load and natural frequency of honeycomb sandwich panels, which provides a new reference for the design optimization of star-shaped concave honeycomb sandwich panels in practical engineering applications.