Composite material tail fin of helicopter has complex structure and lay-up, whose strength and stiffness are verified by experiment before, and whose strength analysis is not carried out. In this paper, MSC serial software is applied to create the finite element mode of composite material structure for helicopter tail fin so as to verify the structure strength under certain critical load cases by Tsai-Wu failure criterion. The calculation results are given to determine the load-carrying characteristic of structure, further to verify the experimental results of the structure. The structure can be evaluated according to the analysis and the experimental results.
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