Sandwich panels find use as energy-absorbing devices and protective structures in various fields. However, due to their mostly rigid surfaces, they might not meet the protection requirements in complex conditions like non-Euclidean geometries of protected objects. To address this issue, a novel sandwich panel structure inspired by the synclastic curvature behavior of auxetic metamaterial was proposed. The surface of the proposed sandwich panel features rotating squares that allow for horizontal stretching, resulting in an improvement in controllability, auxeticity, flexibility, and synclastic curvature compared to traditional sandwich panels. Experimental and numerical methods were used to compare the similarities and differences between the novel and traditional sandwich panels under uniaxial compression. Additionally, different rotation angles and numbers of unit cells were simulated to examine their mechanical properties. The study also explored the auxeticity, stretchability, synclastic curvature, and potential applications of the novel sandwich panel. It was found that appropriate cuts on the sandwich panel can enhance energy absorption. These findings could pave the way for new opportunities in the application and basic research of sandwich panels while providing ideas for enhancing the survivability of panel structures in complex conditions.

夹芯板在各个领域用作能量吸收装置和保护结构。然而，由于它们的表面大多是刚性的，它们可能无法满足复杂条件下的保护要求，例如受保护物体的非欧几里德几何形状。为了解决这个问题，提出了一种受拉胀超材料的同步曲率行为启发的新型夹层板结构。所提出的夹层板表面具有允许水平拉伸的旋转正方形，与传统夹层板相比，可控性、膨胀性、柔韧性和同步曲率得到改善。采用实验和数值方法比较了单轴压缩下新型和传统夹芯板的异同。此外，模拟了不同的旋转角度和晶胞数量以检查它们的机械性能。该研究还探讨了新型夹层板的拉胀性、拉伸性、同步曲率和潜在应用。结果发现，在夹层板上适当切割可以增强能量吸收。这些发现可以为夹层板的应用和基础研究开辟新的机遇，同时为增强面板结构在复杂条件下的生存能力提供思路。