关键词: 蜂窝夹芯板, 剪切, 屈曲载荷, 有限元, 复合材料

Abstract: In this paper, three analytical methods for shear buckling load of honeycomb sandwich panels are studied. The analysis methods include engineering method, linear finite element method and nonlinear finite element method. In the engineering method, the relevant parameters were calculated, and the buckling load coefficient was obtained from the chart directly, and then the buckling load was calculated. The linear finite element method used subspace eigenvalue method to get the eigenvalues of each order. Then the buckling load was obtained as the product of the minimum eigenvalue and the loading load. In the nonlinear finite element method, the buckling load was taken as the load when the minimum principal strain of the upper and lower panels at the point of maximum displacement was separated. The shear test of honeycomb sandwich panel was carried out. The test results showed that the prediction results of engineering method were too conservative. The prediction results of linear finite element method and nonlinear finite element method were very close, and they were in good agreement with the test results.

Key words: honeycomb sandwich, shear, buckling load, finite element, composites