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Probabilistic Fatigue Damage Localization at Unknown Temperatures Using Guided Wave Methods


Abstract This research examines the current challenges of using Lamb wave interrogation methods to localize fatigue crack damage in a complex metallic structural component subjected to unknown temperatures. The goal of this work is to improve damage localization results for a structural component interrogated at an unknown temperature, by developing a probabilistic and reference-free framework for estimating Lamb wave velocities and the damage location. The methodology for damage localization at unknown temperatures includes the following key elements: i) a model that can describe the change in Lamb wave velocities with temperature; ii) the extension of an advanced time-frequency based signal processing technique for enhanced time-of-flight feature ... (more)
Created Date 2013
Contributor Hensberry, Kevin Michael (Author) / Chattopadhyay, Aditi (Advisor) / Liu, Yongming (Committee member) / Papandreou-Suppappola, Antonia (Committee member) / Arizona State University (Publisher)
Subject Aerospace engineering / Engineering / Mechanical engineering
Type Masters Thesis
Extent 90 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note M.S. Aerospace Engineering 2013
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis