Nonlinear Axisymmetric, Thermally Induced Vibrations of a Functionally Graded Spherical Cap

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Asadzadeh Zahra; ESLAMI MOHAMMAD REZA

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Paper Information

Journal: IRANIAN JOURNAL OF MECHANICAL ENGINEERING (ENGLISH) Year:2018 | Volume:20 | Issue:3 Page(s): 133-169

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Information Journal Paper

Title

Nonlinear Axisymmetric, Thermally Induced Vibrations of a Functionally Graded Spherical Cap

Author(s)

Asadzadeh Zahra | ESLAMI MOHAMMAD REZA | Issue Writer Certificate

Keywords

Functionally graded materialQ2

Spherical CapQ1

Thermally Induced VibrationQ1

Uncoupled ThermoelasticityQ1

Abstract

In this study, Thermally Induced Vibrations of a Functionally graded material (FGM) Spherical Cap discussed. Distribution of shell properties in the direction of thickness is calculated from volume fraction relationship. Dependency to temperature is expressed based on the Touloukian formula. Thermal loading on the shell is axisymmetric and the response of the shell have been considered axially symmetric. Ceramic rich surface of the shell is subjected to temperature rise, whereas the metal rich surface of the shell is kept at reference temperature or thermally insulated. Temporal evolution of temperature profile across the shell thickness is obtained through solution of one-dimensional heat conduction equation. This equation is originally nonlinear since temperature dependency of thermal conductivity is taken into account. The first-order shear theory and Von-Karman compatibility relations has been used for deriving the equation. Dynamics equations are derived using Hamilton's principle and with the application of Ritz method has become a set of nonlinear time-dependent algebraic equations. Solving this set of equations is done with Newmark integral method help with numerical method Newton-Raphson. Solution of the transient one dimensional heat conduction equation with the arbitrary type of time-dependent boundary conditions is carried out employing the central finite difference method combined with the Crank– Nicolson time marching scheme. After validating the developed computer code, some parametric studies are accomplished to show the influences of various involved parameters. It is shown that temperature dependency, geometrical non-linearity, shell thickness, power law index, and the type of thermal loading, all affect the temporal evolution of plate characteristics.

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APA: Copy

Asadzadeh, Zahra, & ESLAMI, MOHAMMAD REZA. (2018). Nonlinear Axisymmetric, Thermally Induced Vibrations of a Functionally Graded Spherical Cap. JOURNAL OF MECHANICAL ENGINEERING (ISME) (IRANIAN JOURNAL OF MECHANICAL ENGINEERING-ENGLISH), 20(3 ), 133-169. SID. https://sid.ir/paper/83559/en

Vancouver: Copy

Asadzadeh Zahra, ESLAMI MOHAMMAD REZA. Nonlinear Axisymmetric, Thermally Induced Vibrations of a Functionally Graded Spherical Cap. JOURNAL OF MECHANICAL ENGINEERING (ISME) (IRANIAN JOURNAL OF MECHANICAL ENGINEERING-ENGLISH)[Internet]. 2018;20(3 ):133-169. Available from: https://sid.ir/paper/83559/en

IEEE: Copy

Zahra Asadzadeh, and MOHAMMAD REZA ESLAMI, “Nonlinear Axisymmetric, Thermally Induced Vibrations of a Functionally Graded Spherical Cap,” JOURNAL OF MECHANICAL ENGINEERING (ISME) (IRANIAN JOURNAL OF MECHANICAL ENGINEERING-ENGLISH), vol. 20, no. 3 , pp. 133–169, 2018, [Online]. Available: https://sid.ir/paper/83559/en

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