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Elastic wave propagation in multilay...

Wang, Lugen.

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Elastic wave propagation in multilayered anisotropic media with applications to composite.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Elastic wave propagation in multilayered anisotropic media with applications to composite./
Author:	Wang, Lugen.
Description:	226 p.
Notes:	Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 5346.
Contained By:	Dissertation Abstracts International62-11B.
Subject:	Engineering, Mechanical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3031283
ISBN:	0493440666

Elastic wave propagation in multilayered anisotropic media with applications to composite.
Wang, Lugen.

Elastic wave propagation in multilayered anisotropic media with applications to composite. - 226 p.

Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 5346.

Thesis (Ph.D.)--The Ohio State University, 2001.

An efficient recursive algorithm, the stiffness matrix method, has been developed for wave propagation in multilayered generally-anisotropic media. This algorithm has the computational efficiency and simplicity of the standard transfer matrix method and is unconditionally computationally stable for high frequency and layer thickness. This algorithm is easily adoptable for laminates with periodicity, such as multi-angle lay-up composites. Based on this method, characteristic equations for Lamb and surface waves have been obtained. Analytical formulations for layer stiffness matrix also obtained for isotropic and aniostropic material in plane of symmetry. These formulations are as simple as these for transfer matrix.

ISBN: 0493440666Subjects--Topical Terms:

783786
Engineering, Mechanical.

Elastic wave propagation in multilayered anisotropic media with applications to composite.
LDR:03132nmm 2200313 4500 001 1855739
005 20040629073630.5
008 130614s2001 eng d
020 $a 0493440666
035 $a (UnM)AAI3031283
035 $a AAI3031283
040 $a UnM $c UnM
100 1 $a Wang, Lugen. $3 1943540
245 1 0 $a Elastic wave propagation in multilayered anisotropic media with applications to composite.
300 $a 226 p.
500 $a Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 5346.
500 $a Adviser: Stanislav I. Rokhlin.
502 $a Thesis (Ph.D.)--The Ohio State University, 2001.
520 $a An efficient recursive algorithm, the stiffness matrix method, has been developed for wave propagation in multilayered generally-anisotropic media. This algorithm has the computational efficiency and simplicity of the standard transfer matrix method and is unconditionally computationally stable for high frequency and layer thickness. This algorithm is easily adoptable for laminates with periodicity, such as multi-angle lay-up composites. Based on this method, characteristic equations for Lamb and surface waves have been obtained. Analytical formulations for layer stiffness matrix also obtained for isotropic and aniostropic material in plane of symmetry. These formulations are as simple as these for transfer matrix.
520 $a A dynamic homogenization method based on Floquet wave theory is developed. The theory is based on the equivalence within the homogenization domain of Floquet waves in a periodic medium and plane waves in a dispersive homogeneous anisotropic medium. Based on this theory, an inversion method to determine the lamina elastic moduli of a cross-ply composite from ultrasonic time-delay measurement has been introduced. This method is based on the Floquet wave velocity measurement in a periodic medium within the homogenization zone and lamina properties reconstruction from this velocity.
520 $a The phenomena of wave transmission through a cross-ply composite immersed in fluid have been investigated. The experimental and theoretical results show that the transmission amplitude is highly dependent on ply orientation and angle of incidence at frequency 2.5MHz. Transmission phenomena have been interpreted in terms of Floquet wave, Lamb wave and fluid loading effects.
520 $a The time-domain response of a line focus acoustic microscopy from a composite plate have also been studied. A model based on a recursive stiffness matrix method for a multilayered composite is developed and applied to interpretation of the time-resolved acoustic microscopy signature. The applicability of the time resolved acoustic microscopy signature for determination of elastic constants of a unidirectional composite or one lamina in a cross-ply composite has been demonstrated.
590 $a School code: 0168.
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Geotechnology. $3 1018558
690 $a 0548
690 $a 0428
710 2 0 $a The Ohio State University. $3 718944
773 0 $t Dissertation Abstracts International $g 62-11B.
790 1 0 $a Rokhlin, Stanislav I., $e advisor
790 $a 0168
791 $a Ph.D.
792 $a 2001
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3031283