民机大型加筋曲板在剪切载荷下失效破坏试验

Failure Damage Experiments of Stiffened Panels Subjected to Shear Loading

对民用飞机机身加筋曲板在剪切载荷下承载能力进行了试验和工程算法研究,深入探索了机身壁板的各种破坏模式,进行了工程算法评估,并且把试验结果与计算结果进行了对比。给出了壁板剪切许用值与桁条、框剖面积和蒙皮厚度的关系曲线;按照材料性能参数修正后计算得出的壁板剪切许用值最符合试验结果;在误差控制范围内蒙皮厚度的偏差不会影响壁板的剪切强度。

Results obtained from experiments and approximate computations for a curved stiffened aluminum panel subjected to shear loading are presented. Several damage modes are studied and approximate computations are evaluated. Compared with the experimental data, the curves among the maximum shear load, the area of the stringers and frames, and the thickness of the akin are given. The better result is corrected based on the material mechanical performance. The thickness error of the skin in the range of the deviation does not affect the shear strength.