受面内双向荷载蜂窝材料的弹性屈曲模式及其影响因素

Elastic Buckling Mode and Influence Factors of Hexagonal Honeycombs Under Biaxial Loading

基于压弯耦合梁柱稳定理论,分析了蜂窝材料在面内双轴应力作用下的弹性屈曲行为,得到了蜂窝材料在不同应力荷载作用下发生两种屈曲模式转换的临界条件和对应的屈曲临界荷载。讨论了孔穴几何参数对此转换条件和临界荷载的影响,并用ANSYS软件进行了有限元模拟。结果表明理论分析与数值模拟吻合很好。

Based on the compression-bending coupling stability theory of beam-column,the elastic buckling behavior of honeycombs subject to in-plane biaxial loading is investigated.The critical loading expressions of two different buckling-modes are derived for general cell geometry under different loads.The effects of size and geometrical parameters,such as the ratio of vertical cell-edge thickness to inclined cell-edge thickness,the ratio of vertical cell-edge length to inclined cell-edge length and inclined angle,on the corresponding critical load are discussed.The critical loadings of two different buckling-modes are obtained by finite element analysis.The results may provide theory supports for engineering design of honeycombs.