帽型复合材料加筋叠层板轴压稳定性分析与试验研究

 本文对飞机翼面复合材料帽型加筋平板的轴压稳定性及后屈曲特性进行了试验研究和分析计算。指出了两种从试验上确定蒙皮失稳载荷的方法。用“有限条元素法”计算了失稳载荷,计算值与试验结果符合良好。

ANALYTICAL AND EXPERIMENTAL INVESTIGATIONS ON STABILITY OF COMPOSITE HAT-STIFFENED PANELS UNDER COMPRESSION

In this paper the behaviour of buckling and postbuckling of composite hat-stiffened panels of aircraft wings under compression was investigated experimentlly and analytically. In tests the critical instability load was measured and examined carefully. According to the test results, two methods for experimentlly determining the critical instability load are presented, and the postbuckling stresses distribution and buckling mode of the skin are discribed.The critical instability load is calculated by "Finite Strip-Element Method", and the numerical results are in good agreement with test data.The effect the lateral support conditions on the stability of the panels is analized and the analytical method is discussed and improved.