Impact Damage Detection of FRP Laminates Based on Spectrum Analysis of Lamb Waves

• WADA Akihiro

  Kobe City College of Technology Dept. of Mechanical Engineering

• 元木 信弥

  大阪市立大学大学院 工学研究科

• 山崎 友裕

  大阪市立大学大学院 工学研究科

Bibliographic Information

Other Title

• ラム波スペクトラム解析によるFRP積層板の衝撃損傷検出

Abstract

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.

Journal

• TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A

  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 78 (790), 879-889, 2012

  The Japan Society of Mechanical Engineers

Keywords

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

Details

• CRID: 1390282679454557440
• NII Article ID: 130002050315
• DOI: 10.1299/kikaia.78.879
• ISSN: 18848338
• ISSN: 03875008
• Web Site: https://www.jstage.jst.go.jp/article/kikaia/78/790/78_879/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed