Abstract
This paper is concerned with the thermoelastic analysis of functionally graded (FG) sandwich plates with a homogeneous core by a numerical method. The core layer is homogeneous ceramic while two facesheets are inhomogeneous metal-ceramic FGMs having the power-law volume fractions. The metal-ceramic FG sandwich plates are characterized by the relative thicknesses of three layers, the width-thickness and aspect ratios of plate, and the volume fractions of metal and ceramic. Meanwhile, the problem is formulated using the hierarchical models exhibiting the spectral model accuracy and implemented by 2-D natural element method (NEM). The hierarchical models are based upon the 3-D elasticity and NEM is applied to the mid-surface of plate to approximate the triple-vectored in-plane displacement field. The accuracy of hierarchical models are examined with respect to the model order, from which the (3, 3, 4) hierarchical model is chosen for the thermoelastic analysis. The thermoelastic responses obtained by the present method are compared with the existing analytic solutions, and those are parametrically investigated with respect to the above-mentioned design parameters. It is found that the present method shows a reasonable accuracy and the thermoelastic responses of FG sandwich plates are remarkably influenced by the design parameters.
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Acknowledgements
This work was supported by 2022 Hongik University Research Fund. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (2020R1A2C1100924).
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Jin-Rae Cho received his B.S. degree in Aeronautical Engineering from Seoul National University in 1983. He then received his M.S. and Ph.D. degrees from The University of Texas at Austin in 1993 and 1995, respectively. He is currently a Professor at the Department of Naval Architecture and Ocean Engineering in Hongik University. His major research field is the computational mechanics in solid/structural mechanics, ocean engineering and materials science.
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Cho, JR. Thermoelastic analysis of functionally graded sandwich plates with a homogeneous core. J Mech Sci Technol 36, 4583–4592 (2022). https://doi.org/10.1007/s12206-022-0821-3
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DOI: https://doi.org/10.1007/s12206-022-0821-3