| Citation: | ZHOU Rui, GAO Weicheng, LIU Weiet al. Effects of web cutout on bearing performance of composite beam webs under shear load[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(5): 831-840. doi: 10.13700/j.bh.1001-5965.2020.0659(in Chinese)
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The buckling unstability and post-buckling bearing capacity of plain woven composite beam webs under shear load were investigated through experiments and finite element method in this paper. Based on characteristics of the experimental strain results and numerical buckling mode of the finite element analysis, the buckling characteristics of the composite beam webs were analyzed. Hashin failure criteria for plain woven composite materials were imported in the post-buckling bearing analysis, and the main failure modes of the webs from the numerical results are fiber tensile failure in the warp direction and fiber compressive failure in the weft direction. The simulated failure behavior of the webs agrees well with the experimental results. A parametric study based on the experimentally validated finite element model was conducted to investigate the effects of web cutout size and form on the stability, bearing capacity and failure mode of plain woven composite beam web under shear load. The research results provide reference for the design and strength analysis of composite structures.
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