Mechanical property analysis and experimental demonstration of zero Poisson's ratio mixed cruciform honeycomb
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所属单位：航空学院
发表刊物：MATERIALS RESEARCH EXPRESS
关键字：zero Poisson's ratio mixed cruciform honeycomb in-plane mechanical properties uniaxial deformability bearing capacity
摘要：Out-of-plane bending stiffness of cruciform honeycomb is too low to hold the panel in a horizontal direction. In this regard, zero Poisson's ratio mixed cruciform honeycomb, a novel structure with new topology, is proposed in this paper. Ribs were designed between monolayer core boards in cruciform honeycomb to restrict the displacement in the 1-direction (vertical to ribs) and enhance the stiffness in the 2-direction (parallel to ribs) simultaneously. Elastic constants, which characterize in-plane mechanical properties, were studied through theoretical calculation and numerical simulation. Experiments have also been performed to validate the analytic models, which showed good correlation with analytical formulas and excellent deformable capacity of the mixed cruciform honeycomb. The uniaxial deformability and out-of-plane bearing capacity of the new model improve obviously compared with cruciform honeycomb. By analyzing the relationship between mechanical properties and cell shape parameters, zero Poisson's ratio mixed cruciform honeycomb can be optimized to meet the deform requirements. In addition, the limitation of compression deformability caused by shapes was analyzed to ensure the effectiveness of the structure, and the results that structural density varies with parameters were given as a design reference according to lightweight requirement. To show the superiority of the new model, a comparison between mixed cruciform honeycomb and hybrid cellular honeycomb was developed in terms of in-plane and outof-plane mechanical properties.
ISSN号：2053-1591
是否译文：否
发表时间：2017-04-01
合写作者：Zou, Tingting
通讯作者：周丽