蜂窝夹芯壁板剪切屈曲载荷分析方法对比研究  

Comparative study on shear buckling load analysis methods of honeycomb sandwich panels

作　　者：熊华锋[1] 李磊[1] XIONG Hua-feng;LI Lei(Aircraft Strength Research Institute of China,Xi'an 710065,China)

机构地区：[1]中国飞机强度研究所,西安710065

出　　处：《复合材料科学与工程》2022年第7期107-110,共4页Composites Science and Engineering

摘　　要：本文对蜂窝夹芯壁板剪切屈曲载荷的三种分析方法进行了研究,分析方法包含工程法、线性有限元法和非线性有限元法。工程法中,计算出相关参数后直接查取图表获得屈曲载荷系数,再求出屈曲载荷。线性有限元法利用子空间特征值求解法得到各阶特征值,最小特征值与加载载荷的乘积即为屈曲载荷。非线性有限元法中,以位移最大点处内面板或者外面板的最小主应变变化趋势发生转折时的载荷作为屈曲载荷。进行了蜂窝夹芯板的剪切试验,试验结果表明工程法预测结果过于保守,线性有限元法和非线性有限元法的预测结果很接近,且与试验结果吻合较好。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.

关 键 词：蜂窝夹芯板 剪切 屈曲载荷 有限元 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]