Masters Theses

Title

Health monitoring of adhesively bonded composite patch repair of aircraft structures using wavelet analysis of lamb wave signals

Abstract

"Ultrasonically, Lamb Wave is considered to be a candidate for large area inspection based on its capability of propagating long distanes and its media-thickness dependent propagation properties. Unfortunately, Lamb wave inspection is complicated by the existence of at least two modes at any given frequency. The modes are also highly dispersive in nature. As a result the flaw detection with these ultrasonic signals becomes highly complicated and the interpretation of the signals becomes very difficult and also leads to signal-to-noise problems. Consequently, a new kind of signal analysis is required to interpret the results of inspection and to determine if there is a defect or not...A Wavelet transform method has been developed for Lamb Waves"--Abstract, leaf iii.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Publisher

University of Missouri--Rolla

Publication Date

Fall 2004

Pagination

ix, 58 leaves

Note about bibliography

Includes bibliographical references.

Rights

© 2004 Rabindranath Gubbala, All rights reserved.

Document Type

Thesis - Citation

File Type

text

Language

English

Library of Congress Subject Headings

Lamb waves
Nondestructive testing
Wavelets (Mathematics)

Thesis Number

T 8687

Print OCLC #

62093148

Link to Catalog Record

Full-text not available: Request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b5371661~S5

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