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        Nonlinear supersonic aerothermoelastic analysis of as ymmetrically curved-fiber composite panels with nonuniform temperature distributions

        Yating Liu,Jingbo Duan,Yihang Gao,Buqing Xu 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.3

        The thermal buckle and flutter behaviors of the asymmetrically curved-fiber composite panel in supersonic air flow are studied in frequency and time domains. Based on the Mindlin thick plate theory, the Von Karman large-deformation assumption and the quasisteady supersonic piston theory were adopted to describe deformations and supersonic loads of the composite panel, respectively. According to Hamilton variational principle, the nonlinear aerothermoelastic equations of the asymmetrically curvilinear-fiber panel were established with frequency domain characteristics obtained by the complex mode method and time domain responses obtained by the Newmark method, respectively. After verifying the correctness of the current method, the influences of temperature gradient, curvilinear-fiber orientation and incoming airflow pressure on the static large-deflection, mode coalescence, flutter-buckling boundary, time-history responses and phase-plane plots of the composite panel were discussed in detail.

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