先进复合材料薄壁加筋板轴压屈曲特性及后屈曲承载性能

发布时间：2018-12-08 07:53

【摘要】：对国产先进复合材料薄壁加筋板结构进行了轴向压缩试验。通过监测典型位置的应变和离面位移,研究了该型加筋板的轴压屈曲及后屈曲性能。应用工程算法对试验件的蒙皮初始屈曲载荷和屈曲模态进行了预测,试验结果表明,该型加筋板的轴压屈曲形式依次是筋条间蒙皮的初始屈曲、部分蒙皮的二次屈曲以及4根筋条的柱屈曲;蒙皮发生屈曲后,蒙皮承担的部分载荷转移至筋条,使筋条成为主要承力部分,当筋条发生断裂后,试验件迅速整体破坏;其破坏载荷平均值为482.67 k N,屈曲载荷的平均值为204 k N,前者为后者的2.37倍,说明该型结构具有很大的后屈曲承载空间。
[Abstract]:The axial compression test was carried out on the thin-walled reinforced plate structure of advanced composite materials made in China. The axial buckling and post-buckling behavior of the stiffened plate were studied by monitoring the strain and off-plane displacement of the typical position. The initial buckling load and buckling mode of the skin of the specimen are predicted by the engineering algorithm. The experimental results show that the axial buckling of the stiffened plate is the initial buckling of the skin between the stiffened strips. Second buckling of partial skin and column buckling of 4 tendons; After the buckling of the skin, the load of the skin is transferred to the steel bar, which makes the steel bar become the main bearing force. When the strip breaks, the whole test piece is destroyed rapidly. The average failure load is 482.67 KN and the average buckling load is 204kN. the former is 2.37 times of the latter, indicating that the structure has a large post-buckling bearing space.
【作者单位】：空军工程大学航空航天工程学院;中航工业第一飞机设计研究院;
【基金】：国家自然科学基金(51475470)
【分类号】：V214.8

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