Damage Detection Using Lamb Waves for Structural Health Monitoring

Crider, Jeffrey Stevan

ISBN 10: 1288408447 / ISBN 13: 9781288408443

Published by Biblioscholar, 2012

About this Item

Print on Demand pp. 100.

Seller Inventory # 390041756

Bibliographic Details

• Title: Damage Detection Using Lamb Waves for Structural Health Monitoring
• Publisher: Biblioscholar
• Publication Date: 2012
• Language: English
• ISBN 10: 1288408447
• ISBN 13: 9781288408443
• Binding: Soft cover
• Condition: New

About this title

Synopsis

Nondestructive structural health monitoring (SHM) is an evolving technology being developed for monitoring air and space systems. The information gathered on a system's structural integrity through SHM detection methods may result in reduced costly maintenance inspections, enhanced safety, and system failure predic- tions. This study evaluates Lamb wave approaches used to detect simulated cracks in laboratory experiments on thin plates to detect realistic damage in a test arti- cle representing the complex geometry of an existing aircraft bulkhead. We take a "hot-spot" monitoring approach, where we monitor an area of the structure known to fail. In our experiments, we evaluated the use of piezoelectric generated tuned Lamb waves for crack detection. The use of Lamb waves, guided elastic waves in a plate, has shown promise in detecting highly localized damage due to the relatively short wavelengths of the propagating waves. We evaluated both pitch-catch and pulse-echo approaches for Lamb wave excitation and measurement. Crack detection is accomplished by comparing the responses from the damaged test article to the responses of the healthy test article.