Lamb Wave Based Feature Extraction of Damage in a Stiffened Composite Panel under Varying Temperature

被引：1

作者：

Vizzini, Anthony J., II ^{[1
]}

Chattopadhyay, Aditi ^{[1
]}

机构：

[1] Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA

来源：

HEALTH MONITORING OF STRUCTURAL AND BIOLOGICAL SYSTEMS 2012 | 2012年 / 8348卷

关键词：

Lamb waves; composites; delamination detection; Matching Pursuit Decomposition; temperature variability; MULTIPLE STIFFENERS; SENSOR NETWORK; IDENTIFICATION; SIGNALS;

D O I：

10.1117/12.915413

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents a methodology for determining the existence of delaminations in complex composite structures. The changes in damage features due to changing temperature are investigated. A Lamb wave based active damage detection technique is used. The Matching Pursuit Decomposition (MPD), a time frequency based signal processing technique, is used for feature extraction. The signals from two different test structures, a healthy specimen and a specimen with seeded delamination, are compared to incorporate the effect of manufacturing variability. Tests are conducted under varying ambient temperature. The results obtained validate the effectiveness of this approach in detecting delamination.

引用

页数：9

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