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Analysis of Stability on Composite Stiffened Panels Subjected to Shear Loading under Different Stiffness Conditions

SHI Chu-qian;ZENG Jian-jiang;ZHU Shu-hua;TONG Ming-bo;Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics and Astronautics;  
Experiments and finite-element-method analysis have been conducted to investigate the effect of different stiffness on buckling,post- buckling behavior of composite stiffened panels subjected to shear loading. Moire method is applied in the experiment to observe the buckling model. Carrying capacity of stiffened panels is assessed by the results of the test. The results showed that: the stiffeners remain constant cross- sectional area,changing only the width of the bottom flange and the height of the web,with the web height increases( decreases the width of the bottom flange),the stiffener is relatively skinned moment of inertia increases,the buckling load decreases. Stiffness of the Stiffener greater impact on the buckling load,but has little effect on the failure load. Finite element simulation results are in good agreement with the experimental results.
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