Sandwich structures have superior mechanical properties to be applied in civil, marine, mechanical and aerospace engineering fields. Auxetic structures with negative Poisson's ratio (NPR) can contract laterally when compressed axially to be excellent fillers for the sandwich structures to improve the energy absorption performance. In this work, a cylindrical sandwich filled with double arrowed auxetic structure is proposed. An analytical model is established to predict the dynamic responses of the sandwich structure under axial impact loading. The theoretical model is composed of three parts: energy dissipated due to the auxetic filler, the thin walled tubes, and their interaction. Numerical simulations are performed to validate the theoretical model and the results indicate that the theoretical model proposed is accurate to predict the crushing platform stress of the cylindrical sandwich under axial impact loading.

三明治结构具有优异的机械性能，可应用于土木，海洋，机械和航空航天工程领域。具有负泊松比（NPR）的辅助结构在轴向压缩时可横向收缩，从而成为三明治结构的优良填料，从而改善了能量吸收性能。在这项工作中，提出了一种充满双箭头发胀结构的圆柱形三明治。建立了一个分析模型来预测夹层结构在轴向冲击载荷下的动力响应。该理论模型由三部分组成：由于膨胀填充物而耗散的能量，薄壁管及其相互作用。