Damage Detection in Composite Structures using Lamb Wave Analysis and Time-Frequency Approach

被引：2

作者：

Liu, Yingtao ^{[1
]}

Fard, Masoud Yekani ^{[1
]}

Kim, Seung Bum ^{[1
]}

Chattopadhyay, Aditi ^{[1
]}

Doyle, Derek ^{[2
]}

机构：

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

[2] US Air Force Res Lab, Kirtland AFB, NM 87117 USA

来源：

SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL, MECHANICAL, AND AEROSPACE SYSTEMS 2011 | 2011年 / 7981卷

关键词：

Damage estimation; structural health monitoring; Lamb wave; mode conversion; time-frequency analysis; matching pursuit decomposition; IDENTIFICATION;

D O I：

10.1117/12.880664

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A methodology based on Lamb wave analysis and time-frequency signal processing has been developed for damage detection and structural health monitoring of composite structures. Because the Lamb wave signals are complex in nature, robust signal processing techniques are required to extract damage features. In this paper, Lamb wave mode conversion is used to detect the damage in composite structures. Matching pursuit decomposition algorithm is used to represent each Lamb wave mode in the time-frequency domain. Results from numerical Lamb wave propagation simulations and experiments using orthotropic composite plate structures are presented. The capability of the proposed algorithm is demonstrated by detecting seeded delaminations in the composite plate samples. The advantages of the methodology include accurate time-frequency resolution, robustness to noise, high computational efficiency and ease of post-processing.

引用

页数：15

共 15 条

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