| Citation: | YUE Xishan, YAN Qun, ZHAO Wei, et al. Influence of one side facesheet crack damage on flexural properties of titanium honeycomb sandwich structures[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(11): 2018-2025. doi: 10.13700/j.bh.1001-5965.2019.0587(in Chinese)
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During the manufacturing process and service period, the crack damage may occur in the facesheet of titanium honeycomb sandwich structure. The influence of one side facesheet crack damage on flexural properties of titanium honeycomb sandwich structures was studied experimentally and numerically. The research results show that the flexural strength of titanium honeycomb sandwich structure with one side facesheet crack damage is obviously lower than that of the structure without crack damage, and the flexural strength decreases linearly with the increase of the crack length; the finite element models can accurately predict the failure mode and fracture strength of the structures, and the maximum deviation between the predicted results and the test result is only 6%. The finite element analysis method can be used to predict the flexural strength of titanium honeycomb sandwich structure with facesheet crack damage in the engineering estimate.
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