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    題名: Evaluation of Laminated Composite Beam Theory Accuracy
    作者: Lyu, Yu-Ting
    Hung, Tsung-Pin
    Ay, Her-Chang
    Tsai, Hsiu-An
    CHIANG, YIH-CHERNG
    貢獻者: Department of Mechanical Engineering
    關鍵詞: CFRP;effective stiffness;finite element analysis;laminated composite beam;UAV
    日期: 2022-10
    上傳時間: 2022-11-22 15:34:10 (UTC+8)
    出版者: MDPI
    摘要: Carbon fiber-reinforced polymer (CFRP) has been widely implemented in electric vehicle bodies and aircraft fuselage structures. The purpose of CFRP is to reduce the weight and impart rigidity in the final product. A beam structure is typically used to bear the structural load, and the rigidity of the beam can be changed by arranging the laminated fibers at different angles. In this study, a composite I-beam is used as an example in engineering components. Because the theoretical model of the superimposed composite I-beam is established, the theoretical formula is based on the theoretical assumptions of the two-dimensional composite beam, and is combined with the traditional composite plate theory to analyze the maximum bending stress, strain, and deflection. During the theoretical derivation, it is assumed that the flanges of the I-beams are divided into narrow and wide flanges. The beams are considered as structures of beams and flatbeds. When a narrow flange is loaded in the side, the wide flange has no lateral deformation, and the lateral moments are neglected. Therefore, the accuracy of this formula needs to be verified. The purpose of this study is to verify the accuracy of theoretical solutions for the deflection and stress analysis of composite beams. A finite element analysis model is used as the basis for comparing the theoretical solutions. The results indicate that when the aspect ratio of the beam is >15, the theoretical solution will have better accuracy. Without the addition of the material, when 0° ply is placed on the outermost layer of the flange of the nonsymmetric beam, the effective rigidity of the beam is increased by 4–5% compared with the symmetrical beam. The accuracy range of the theoretical solution for the composite beams can be accurately defined based on the results of this study.
    關聯: Materials開放取用卷 15, 期 19October 2022 論文號碼 6941
    顯示於類別:[機械工程系暨機械工程學系數位機電研究所] 期刊論文

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