Title of article
Torsional wave propagation in 1D and two dimensional functionally graded rod
Author/Authors
Amiri, Alireza Department of Mechanical Engineering - Shahid Nikbakht faculty - University of Sistan and Baluchestan, Zahedan , Rahmani, Hossein Department of Mechanical Engineering - Shahid Nikbakht faculty - University of Sistan and Baluchestan, Zahedan , Ahmadi Balootaki, Mohammad Department of Mechanical Engineering - Shahid Nikbakht faculty - University of Sistan and Baluchestan, Zahedan
Pages
21
From page
1
To page
21
Abstract
In this study, torsional wave propagation is investigated in a rod that are made of one and two dimensional functionally graded material. Firstly, the governing equations of the wave propagation in the functionally graded cylinder derived in polar coordinate. Secondly, finite difference method is used to discretize the equations. The Von Neumann stability approach is used to obtain the time step size. Two states are assumed for material distribution, in first state it’s considered that the material variation occurred only in radial direction(Ti6A14V and Al2O3) and in second state the material properties vary in radial and length directions(BN, Al 1100, Ti6A14V and Al2O3). Moreover, the effect of cutoff frequency and boundary condition in wave propagation is studied. The results was validated by comparing the analytical and numerical solutions for an isotropic rode subjected to a torsional impulsive load. The results show that the torsional wave propagation in FGM rod evidently effects by material composition variation.
Keywords
Functionally graded materials , finite difference method , wave propagation , torsional wave
Journal title
Journal of Computational Applied Mechanics
Serial Year
2020
Record number
2546689
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