Due to its unique deformation form, Negative Poisson’s ratio sandwich structure has excellent energy absorption, but the low load capacity limits its engineering applications. In this paper, we design a new negative Poisson’s ratio rectangular tube periodic sandwich structure. There are many beams in this structure which appear plastic hinges when compressed. After further compression, the rectangular tube wall buckles and the core shrinks inward, which realizes that the structure exhibits high-performance energy absorption ability and excellent mechanical properties. Three-dimensional finite element model of sandwich structure with negative Poisson’s ratio of periodic rectangular tube quasi-static compression test and low-velocity impact were investigated by the use of ABAQUS/Explicit software. The accuracy of the simulation method was verified by the comparison of test and simulation results. Based on the validated numerical models were further investigated to comprehensively understand the influence of rectangular tube unit cell wall thickness (t) and cell height (h) on the load capacity and energy absorption capacity of the specimen. The energy absorption capacity and mechanical properties of the proposed negative Poisson’s ratio sandwich structure could be enhanced by optimizing the design of rectangular tube unit cell wall thickness (t) and rectangular tube unit cell height (h). The present findings offer insights into the application of negative Poisson’s ratio sandwich structure impact energy-absorbing structures in aerospace, automotive and other fields.

由于其独特的变形形式，负泊松比夹层结构具有优异的吸能性，但承载能力低限制了其工程应用。在本文中，我们设计了一种新的负泊松比矩形管周期夹层结构。这种结构中有许多梁在压缩时会出现塑性铰。进一步压缩后，矩形管壁发生屈曲，芯部向内收缩，实现了该结构具有高性能的吸能能力和优异的力学性能。采用ABAQUS/Explicit软件研究了周期矩形管准静态压缩试验和低速冲击负泊松比夹层结构三维有限元模型。通过试验与仿真结果的对比，验证了仿真方法的准确性。基于经过验证的数值模型进一步研究，全面了解矩形管晶胞壁厚的影响（t ) 和单元高度 ( h ) 对试样的承载能力和能量吸收能力的影响。通过优化矩形管晶胞壁厚 ( t ) 和矩形管晶胞高度 ( h ) 的设计，可以提高所提出的负泊松比夹层结构的能量吸收能力和力学性能。目前的研究结果为负泊松比夹层结构冲击吸能结构在航空航天、汽车和其他领域的应用提供了见解。