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开展了复合材料加筋板轴压稳定性实验,对加筋板的屈曲及后屈曲性能、破坏模式和后屈曲失效表征进行了研究.实验结果表明加筋板在轴压下具有良好后屈曲承载潜能,破坏载荷约为屈曲载荷的2.2倍;其屈曲模式为筋条间蒙皮首先发生屈曲失稳,筋条在整个承载过程中保持直线,起到“屈曲分隔”的作用.通过对加筋板屈曲及后屈曲性能的理论分析,得出的理论屈曲载荷和理论破坏载荷与实验结果相对误差均小于8%,并确定了在后屈曲过程中蒙皮中心挠度的变化规律和轴向载荷的面内分布特征.
The axial compression stability of composite stiffened plates was studied and the buckling and post-buckling behavior, failure mode and post-buckling failure characterization of the stiffened plates were studied.The experimental results show that the stiffened plates have good post-buckling bearing under axial compression The potential and failure load is about 2.2 times of the buckling load. The buckling mode is the buckling instability of the skin between stiffeners first, and the stiffeners maintain a straight line during the whole bearing process and play the role of buckling separation. The theoretical analysis of the buckling and post-buckling of the stiffened plate shows that the relative errors between the theoretical buckling load and the theoretical buckling load and the experimental results are less than 8%, and the variation law of the center of the skin center deflection and the axial In-plane distribution of loads.