| Citation: | HUI Li, CHEN Xiaowei, ZHOU Song, et al. Shear property analysis of laser welding stiffened panel with cover[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(3): 446-453. doi: 10.13700/j.bh.1001-5965.2018.0414(in Chinese)
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Shear stability test was carried out on the dual beam laser welding stiffened panel with cover. The buckling load, buckling form, post-buckling carrying capacity and failure modes of the stiffened panel with cover under shear loading were analyzed. A finite element method was utilized to model the stiffened panel and shear fixture. Simulation calculation of shear instability modes and post-buckling carrying capacity of stiffened panel. Meanwhile, the effects of cover on the carrying capacity, stress distribution and deformation of cutout stiffened panels were investigated. The results show that, in the sheared state of the stiffened panel with cover, when the buckling ratio reaches 1.95, the stiffened panel enters into post-buckling and the final failure load is approximately 2.98 times the buckling load. The load-displacement curves obtained from simulation and test are in good agreement, and the errors for the buckling loads and failure loads obtained from the numerical calculations compared with the test average value are 8.7% and 1.02%, respectively. The rigidity and load-carrying capacity of open stiffened panel reduce, and the bolt fastening cover has a great influence on the stress and out-of-plane deformation.
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