Interaction of acoustic waves and anisotropic multilayered composite plates immersed in water.

In this dissertation a theoretical analysis of elastic wave propagation in multilayered anisotropic composite plates is presented. Reflection and transmission coefficients as a function of the plane wave incident angle and ultrasonic wave frequency are computed for single layered and multilayered plates. From the minima of the reflection spectra one can obtain the Lamb wave modes. Computation of the displacement and stress components inside the plate show that different Lamb wave modes excite different levels of energy at various depths of the plate. These modes can be effectively used to detect and image defects in different layers of a plate. Theoretical predictions have been qualitatively verified experimentally by imaging internal defects inside different layers of a multilayered composite plate by different Lamb wave modes. Numerical precision problems associated with such analyses have been completed avoided for an unidirectional composite plate by solving the problem by symbolic programming instead of conventional numerical matrix manipulation technique.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

doctoral

Discipline thesis:degree_discipline

Civil Engineering and Engineering Mechanics

Grantor dc:publisher

The University of Arizona.

Year dc:date.issued

1994

Author dc:creator

• Yang, Wei

Committee members dc:contributor.committeemember

• Contractor, Dinshaw N.
• Desai, Chandrakant S.
• Kiousis, Panos
• Armaleh, Sonia Hanna

Statement dc:rights

• Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.

Language dc:language.iso

en

Handle dc:identifier.uri

http://hdl.handle.net/10150/186960

OAI identifier oai:identifier

oai:repository.arizona.edu:10150/186960