Design and Analysis of a New Buffer Structure with Negative Stiffness and Poisson’s Ratio

• DOI: 10.1061/jaeeez.aseng-5392
• Publication Date: 2024-04-17T14:43:42Z
• Authors: Shaofei Yang; Ming Zhang; Chulin Chen; Shuang Ruan; Xiazheng Shi
• Keywords: Poisson's ratio; Auxetics

A new structure with negative stiffness and Poisson's ratio was designed to exhibit these characteristics during compression, energy absorption, storage. The also shows improved impact resistance under extreme conditions due transverse contraction compression. These make the very suitable for use in spacecraft landing systems. finite-element model using Auricchio constitutive established, compression tests were conducted on structure. test results are agreement simulation, validating model. Comparing traditional structures ratio, demonstrated significantly better absorption experienced minimal deformation compression-pull process. In addition, used analyze influence of cell structural parameters. Further analysis showed that width wall thickness a curved beam critical parameters influencing structure's overall energy-absorption performance, which should be emphasized design devices