【摘要】 负泊松比结构由于具有优异的力学性能而广泛应用于各工程领域。将星形蜂窝结构与内凹结构相结合，提出了一种新型内凹角型负泊松比蜂窝结构。首先，基于对称性将胞元结构简化分析，利用能量法对该结构的泊松比和等效弹性模量解析式进行推导。其次，采用Abaqus有限元软件对该结构竖直方向压缩力学性能进行研究，将数值模拟结果与理论计算结果比较分析，验证了解析表达式的准确性。最后，讨论了胞元结构的不同几何参数对结构等效泊松比和等效弹性模量变化的影响，并将该结构的等效力学性能与常规星形蜂窝结构进行了对比分析。结果表明，该结构具有良好的负泊松比特性，并且通过改变几何参数的大小，可以对结构的等效力学性能进行调整。研究结果可为新型负泊松比超材料的设计提供一定的参考。更多还原

【Abstract】 Negative Poisson ratio structures are widely applied in various engineering fields due to their excellent mechanical properties. By combining the star-shaped honeycomb structure with the re-entrant structure, a novel re-entrant angle-type negative Poisson ratio honeycomb structure is proposed. Firstly, the unit cell structure was simplified and analyzed based on symmetry, and the analytical expressions for the Poisson ratio and equivalent elasticity modulus of the structure were derived using the energy method. Secondly, the vertical compressive mechanical properties of the structure were investigated using Abaqus finite element software, and the numerical simulation results were compared with the theoretical calculations to validate the accuracy of the analytical expressions. Finally, the influence of different geometric parameters of the unit cell structure on the equivalent Poisson ratio and equivalent elasticity modulus was discussed, and the equivalent mechanical properties of the structure were compared with those of conventional star-shaped honeycomb structures. The results demonstrate that the proposed structure exhibits favorable negative Poisson ratio characteristics, and its equivalent mechanical properties can be adjusted by modifying the geometric parameters. The findings provide valuable insights for the design of novel negative Poisson ratio metamaterials.更多还原