Impact damage detection of FRP laminates based on spectrum analysis of lamb waves

被引：0

作者：

Wada, Akihiro ^{[1
]}

Motogi, Shinya ^{[1
]}

Yamasaki, Tomohiro ^{[1
]}

机构：

[1] Dept. of Mechanical Engineering, Kobe City College of Technology, Nishi-ku, Kobe, 651-2194, 8-3, Gakuenhigashi-machi

来源：

Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A | 2012年 / 78卷 / 790期

基金：

日本学术振兴会;

关键词：

Composite Material; Lamb Waves; Laminated Construction; Nondestructive Inspection; Spectrum Analysis; Ultrasonic Inspection;

D O I：

10.1299/kikaia.78.879

中图分类号：

学科分类号：

摘要：

A new technique using Lamb waves has been proposed to detect impact damages in FRP laminates nondestructively. Conventional ultrasonic testing such as C-scan requires two-dimensional scanning for whole area inspection because the inspected area by one operation is relatively small. In this study, for quick detection of a localized defect, spectrum analysis of Lamb waves is demonstrated. Instead of wave velocity or attenuation, acousto-ultrasonic parameters (AU parameters), which are based on the amplitude spectrum of the broadband signal, are introduced to improve the precision of the inspection. Among the several AU parameters, A2 and A4/A3 parameters, which represent the centroid and the torsion of the spectral density curve respectively, are found to be more useful to identify a localized defect in laminated composite plates. It is also found that the inspection accuracy depends on the wave propagation direction reflecting to the scattering of higher frequency waves, and can be improved by use of burst waves. © 2012 The Japan Society of Mechanical Engineers.

引用

页码：879 / 889

页数：10

共 15 条

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