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Structural Engineering and Mechanics Volume 61, Number 4, February25 2017 , pages 551-561 DOI: https://doi.org/10.12989/sem.2017.61.4.551 |
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An approximate spectral element model for the dynamic analysis of an FGM bar in axial vibration |
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Minsik Lee, Ilwook Park and Usik Lee
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| Abstract | ||
| As FGM (functionally graded material) bars which vibrate in axial or longitudinal direction have great potential for applications in diverse engineering fields, developing a reliable mathematical model that provides very reliable vibration and wave characteristics of a FGM axial bar, especially at high frequencies, has been an important research issue during last decades. Thus, as an extension of the previous works (Hong et al. 2014, Hong and Lee 2015) on three-layered FGM axial bars (hereafter called FGM bars), an enhanced spectral element model is proposed for a FGM bar model in which axial and radial displacements in the radial direction are treated more realistic by representing the inner FGM layer by multiple sub-layers. The accuracy and performance of the proposed enhanced spectral element model is evaluated by comparison with the solutions obtained by using the commercial finite element package ANSYS. The proposed enhanced spectral element model is also evaluated by comparison with the author | ||
| Key Words | ||
| functionally graded material (FGM); three-layered FGM axial bar; spectral element method; dynamic responses; waves | ||
| Address | ||
| Minsik Lee, Ilwook Park and Usik Lee : Department of Mechanical Engineering, Inha University, Inha-ro 100, Nam-gu, Incheon 22212, Republic of Korea | ||