As a kind of mechanical metamaterials with negative Poisson’s ratio (NPR), auxetic lattices possess unusual mechanical responses such as higher sensitivity to strain and reversibility after large deformation. Therefore, they are regarded as a potential candidate to sensors, actuators, and optics. Here, we designed four types of auxetic lattices with long stress plateau based on the assembly of hollow shell cuboctahedron. To begin with, experiments along with finite element simulations were performed to probe their auxetic behaviors under uniaxial compression, which give an excellent qualitative and quantitative agreement. To establish design criteria on specific applications, we systematically investigated the mechanical properties of the four kinds of lattices with different volume fractions, including critical stresses, strain–stress curves, strain energy densities, strain-dependent Poisson’s ratios, and the length of stress plateau. The results demonstrate that these lattices can suffer from buckling with NPR in an extended range of volume fractions, and high reversibility was observed in several compressive loadings, which provides insight into energy absorption such as the body protection equipments and smart packaging material

作为一种具有负泊松比（NPR）的机械超材料，膨胀晶格具有不同寻常的机械响应，例如对应变的敏感性更高，并且在大变形后具有可逆性。因此，它们被认为是传感器，执行器和光学器件的潜在候选者。在此，我们基于空心壳立方八面体的组装设计了四种具有高应力平台的膨胀晶格。首先，进行了实验和有限元模拟，以探究其在单轴压缩下的膨胀行为，从而给出了极好的定性和定量一致性。为了建立针对特定应用的设计标准，我们系统地研究了具有不同体积分数的四种晶格的力学性能，包括临界应力，应变-应力曲线，应变能密度，与应变有关的泊松比以及应力平台的长度。结果表明，这些晶格可能会在较大的体积分数范围内遭受NPR的屈曲，并且在多个压缩载荷下均观察到了高可逆性，从而为诸如人体防护设备和智能包装材料等能量吸收提供了见识