Elastic wave propagation in anisotropic pipes in circumferential direction: An analytical study

Persistent Link:
http://hdl.handle.net/10150/290234
Title:
Elastic wave propagation in anisotropic pipes in circumferential direction: An analytical study
Author:
Towfighi, Saeed
Issue Date:
2001
Publisher:
The University of Arizona.
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.
Abstract:
Detection of stress corrosion cracks and other types of deterioration in pipes can be performed by producing elastic Lamb waves in the circumferential direction. Availability of Fiber Composite materials that have been utilized to retrofit the pipeline networks necessitates development of new theoretical procedures to analyze the behavior of anisotropic materials including Fiber Composites. The study of propagation of elastic waves in the circumferential direction for anisotropic materials primarily requires the derivation of dispersion curves. To obtain the dispersion curves, governing differential equations must be solved and the boundary conditions must be satisfied. Since differential equations for anisotropic materials are coupled, a general new analytical model is introduced which is capable of solving the coupled differential equations and removes the obstacle of decoupling which might not be always possible. To verify the validity of the new technique the results have been compared with the available data for isotropic materials and have matched satisfactorily. The proposed method can be extended to investigate pipe walls composed of several layers of isotropic and anisotropic materials and for problems with other types of geometry and boundary conditions.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Engineering, Civil.; Engineering, Mechanical.; Engineering, Materials Science.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Civil Engineering and Engineering Mechanics
Degree Grantor:
University of Arizona
Advisor:
Kundu, Tribikram; Ehsani, Mohammad R.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleElastic wave propagation in anisotropic pipes in circumferential direction: An analytical studyen_US
dc.creatorTowfighi, Saeeden_US
dc.contributor.authorTowfighi, Saeeden_US
dc.date.issued2001en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © 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.en_US
dc.description.abstractDetection of stress corrosion cracks and other types of deterioration in pipes can be performed by producing elastic Lamb waves in the circumferential direction. Availability of Fiber Composite materials that have been utilized to retrofit the pipeline networks necessitates development of new theoretical procedures to analyze the behavior of anisotropic materials including Fiber Composites. The study of propagation of elastic waves in the circumferential direction for anisotropic materials primarily requires the derivation of dispersion curves. To obtain the dispersion curves, governing differential equations must be solved and the boundary conditions must be satisfied. Since differential equations for anisotropic materials are coupled, a general new analytical model is introduced which is capable of solving the coupled differential equations and removes the obstacle of decoupling which might not be always possible. To verify the validity of the new technique the results have been compared with the available data for isotropic materials and have matched satisfactorily. The proposed method can be extended to investigate pipe walls composed of several layers of isotropic and anisotropic materials and for problems with other types of geometry and boundary conditions.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectEngineering, Civil.en_US
dc.subjectEngineering, Mechanical.en_US
dc.subjectEngineering, Materials Science.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineCivil Engineering and Engineering Mechanicsen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorKundu, Tribikramen_US
dc.contributor.advisorEhsani, Mohammad R.en_US
dc.identifier.proquest3016492en_US
dc.identifier.bibrecord.b4193913xen_US
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