Title of article :
Wave propagation analysis in anisotropic and inhomogeneous uncracked and cracked structures using pseudospectral finite element method
Author/Authors :
R. Sridhar، نويسنده , , A. Chakraborty and K. Kim ، نويسنده , , S. Gopalakrishnan، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Pages :
35
From page :
4997
To page :
5031
Abstract :
The work deals with the development of an effective numerical tool in the form of pseudospectral method for wave propagation analysis in anisotropic and inhomogeneous structures. Chebyshev polynomials are used as basis functions and Chebyshev–Gauss–Lobatto points are used as grid points. The formulation is implemented in the same way as conventional finite element method. The element is tested successfully on a variety of problems involving isotropic, orthotropic and functionally graded material (FGM) structures. The formulation is validated by performing static, free vibration and wave propagation analysis. The accuracy of the element in predicting stresses is compared with conventional finite elements. Free vibration analysis is carried out on composite and FGM beams and the computational resources saved in each case are presented. Wave propagation analysis is carried out using the element on anisotropic and inhomogeneous beams and layer structures. Wave propagation in thin double bounded media over long propagating distances is studied. Finally, a study on scattering of waves due to embedded horizontal and vertical cracks is carried out, where the effectiveness of modulated pulse in detecting small cracks in composites and FGMs has been demonstrated.
Keywords :
FGM , Composite , Wave scattering , Chebyshev polynomial , Structural health monitoring , High frequency
Journal title :
International Journal of Solids and Structures
Serial Year :
2006
Journal title :
International Journal of Solids and Structures
Record number :
448625
Link To Document :
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