正六角形蜂窝夹芯层弯曲刚度理论分析

论文研究了由正六角形胞元构成的正六角形蜂窝夹芯层弯曲刚度.由于正六角形蜂窝夹芯层受面内载荷作用时在胞元斜壁上引起的弯矩与受面外载荷作用时在胞元斜壁上产生的弯矩有所不同,因此,基于面内变形的正六角形蜂窝夹芯层面内等效弹性参数不能用于计算正六角形蜂窝夹芯层弯曲变形.论文基于正六角形蜂窝夹芯层产生弯曲变形时三胞元壁板连接处转角为零的条件会导致正六角形胞元斜壁产生扭曲变形的事实,提出了一种新的正六角形蜂窝夹芯层理论分析方法.用论文方法计算得到的数值结果与有限元商用软件MSC.Marc计算得到的数值解进行对比,表明论文方法不但有效而且可行.

A THEORECTICAL STUDY ON THE BENDING RIGIDITY OF HONEYCOMB CORE CONSISTING OF RIGHT HEXAGONAL CELLS

In this paper,the bending rigidity of honeycomb core consisting of right hexagonal cells is investigated.Since the moment exerted on the oblique cell walls of the right hexagonal cells under in-plane loading is quite different from the one exerted on the oblique cell walls of the right hexagonal cells under out-of-plane loading,the bending deformation cannot be directly calculated by the equivalent elastic mechanical properties based on the in-plane deformation.According to the fact that the oblique cell wall is twisted under the condition that the rotation is zero at the junction among three adjacent cell walls of the right hexagonal cell under the bending deformation,a novel analytical method for solving the bending rigidity of the honeycomb structures is proposed.Comparisons of present analytical results with those numerical solutions from the common FEM commercial software MSC.Marc show that the present method is efficient and applicable.