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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.79 No.4
- 발행연도
- 2021.8
- 수록면
- 401 - 413 (13page)
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In this paper, in various boundary conditions, the vibration behavior of the two types of porous FG truncated conical sandwich shells is investigated based on the improved high order sandwich shells theory. Two types of porosity are considered in the power law rule to model the FGM properties. In the first type, FG face sheets cover a homogeneous core, and in the second one, the FG core is covered by the homogeneous face sheets. All materials are temperature dependent. By utilizing the Hamilton’s energy principle, using the nonlinear von Karman strains in the layers and considering the in-plane stresses and thermal stresses in the core and the face sheets, the governing equations are obtained. A Galerkin method is used to solve the equations with clamped-clamped, clamped-free, and free-free boundary conditions. To validate the results, a FEM software is used and some results are validated with the results in the literatures. Also, Some geometrical parameters, temperature variations and porosity effects are studied. By increasing the length to thickness ratio, temperature, the semi-vertex angle and the radius to thickness ratio, the fundamental frequency parameter decreases in all boundary conditions. In both types of sandwiches for both porosity distributions, by increasing the porosity volume fraction, the fundamental frequency parameters increase. Frequency variation of type-II is lower than type-I in the thermal conditions. And the fundamental frequencies of the clamped-clamped (CC) and clamped-free (C-F) boundary conditions have the highest and lowest values, respectively.
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참고문헌 (21)
참고문헌 신청
Bakhtiari, M. / 2020 / Nonlinear vibration of truncated conical shells : Donnell, Sanders and Nemeth theories / Int. J. Nonlin. Sci. Numer. Simul 21(1):83~97
Keramat Malekzadeh Fard / 2015 / New enhanced higher order free vibration analysis of thick truncated conical sandwich shells with flexible cores / Structural Engineering and Mechanics, An Int＇l Journal 55(4):719~742
Frostig, Y. B. / 1992 / High-order theory for sandwich-beam behavior with transversely flexible core / J. Eng. Mech 118(5):1026~1043
Kai Yan / 2020 / Vibrational characteristic of FG porous conical shells using Donnell’s shell theory / Steel and Composite Structures, An International Journal 35(2):249~260
Irie, T. / 1984 / Natural frequencies of truncated conical shells / J. Sound, Vib 92(3):447~453
Keramat Malekzadeh Fard / 2015 / New enhanced higher order free vibration analysis of thick truncated conical sandwich shells with flexible cores / Structural Engineering and Mechanics, An Int＇l Journal 55(4):719~742
Frostig, Y. B. / 1992 / High-order theory for sandwich-beam behavior with transversely flexible core / J. Eng. Mech 118(5):1026~1043
Kai Yan / 2020 / Vibrational characteristic of FG porous conical shells using Donnell’s shell theory / Steel and Composite Structures, An International Journal 35(2):249~260
Irie, T. / 1984 / Natural frequencies of truncated conical shells / J. Sound, Vib 92(3):447~453
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