The star-shaped reentrant honeycomb produces lateral shrinkage but also rotation under compression. With the consideration of such interesting deformation characteristics, the dynamic deformation evolution of the sandwich beam with star-shaped reentrant honeycomb core (SSRHC) was carried out for the first time. In this experiment, the aluminum foam projectile was used to produce local impulsive loading on the sandwich beam to research failure/deformation modes and deformation evolution of the SSRHC. The experimental results demonstrated the simultaneous shrinking and rotating deformations in the core. Finite element model (FEM) was employed to capture the dynamic mechanical response of panels and SSRHC on account of experimental results. Numerical results illustrated that the face panel moved toward the loading area in the early stage of impact, and local shrinkage or expansion was found within different regions of the star honeycomb cores during the entire compression process. In addition, it was found that the rotational deformation of the star honeycomb cells mainly occurred in the local indentation stage of the sandwich beam.

星形凹入蜂窝会产生横向收缩，但在压缩下也会旋转。考虑到这种有趣的变形特性，首次进行了星形凹入蜂窝芯夹芯梁（SSRHC）的动态变形演化。在该实验中，泡沫铝弹被用于在夹层梁上产生局部冲击载荷，以研究SSRHC的破坏/变形模式和变形演化。实验结果表明，芯部同时发生收缩和旋转变形。考虑到实验结果，采用有限元模型（FEM）来捕获面板和SSRHC的动态机械响应。数值结果表明，在冲击的早期，面板朝装载区域移动，在整个压缩过程中，发现星形蜂窝状芯的不同区域出现局部收缩或膨胀。另外，发现星形蜂窝单元的旋转变形主要发生在夹层梁的局部压痕阶段。