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- W2893374089 abstract "Based on the first-order shear deformation theory, this study investigated the effect of shear deformation on the contribution rates of normal and shear strain energies to the natural frequencies of functionally graded beams. This is a new analytical method to investigate the effect of shear deformation, and the analytical technique can more accurately evaluate the effect of shear deformation compared with those using the frequency ratio. The coupled axial-bending vibrations are considered, and the material properties of the structure are continuously varied according to power law distribution along the height of the cross section. Under these assumptions, the contribution rates of the related strain energies are predicted from the relationship between the maximum strain and kinetic energies. The shape function of the displacement required in the computation of the contribution rate is deduced by an exact transfer matrix method, and the developed method is used to obtain the exact eigenpairs and shape functions. The effect of shear deformation is examined for various boundary conditions, length-to-height ratios, and variations in the power law index . Therefore, the length-to-height ratios capable of ignoring these shear effects are analyzed for the first four bending-dominated frequencies of the functionally graded beams. The accuracy of the developed transfer matrix method is demonstrated via comparison with the results discussed in previous works; further, we successfully calculated the contribution rate. In addition, the axial-bending displacements coupled by the use of functionally graded materials are investigated to ascertain the reason for the decoupling phenomenon in homogeneous beams. • Effects of shear deformation are analyzed from the contribution rate of energies. • Contribution rates are computed from the relationship between two maximum energies. • Contribution rates are investigated in detail through various examples. • A transfer matrix is developed to determine the exact eigenpairs and shape functions." @default.
- W2893374089 created "2018-10-05" @default.
- W2893374089 creator A5011025505 @default.
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- W2893374089 date "2019-02-01" @default.
- W2893374089 modified "2023-09-24" @default.
- W2893374089 title "Contribution rates of normal and shear strain energies to the natural frequencies of functionally graded shear deformation beams" @default.
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- W2893374089 doi "https://doi.org/10.1016/j.compositesb.2018.09.050" @default.
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