Detection of fatigue crack in an aluminium pipe with nonlinear guided waves

R. Guan, Y. Lu, K. Wang, Z. Su

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Guided wave based inspection using nonlinear characteristics has attracted great attention for microscale damage in metallic structures. However, the curvature of the pipeline complicates the detection of damage in it. In this study, fatigue testing with a nonlinear signal collecting system and surface-bonded piezoelectric transducers is carried out to identify the fatigue crack in an aluminium pipe using second harmonic as nonlinear wave characteristics. Due to the co-existence of multiple wave modes in a pipe structure, an appropriate nonlinear index is used to describe the nonlinearity. The experimental results show that the breathing behaviour exists only at the early stage of the fatigue crack within 1 mm in length and it can be detected by the method based on nonlinear guided waves. This study provides an effective approach for the measurement of the fatigue crack initiation in pipe-like structures using piezoelectric transducers.

Original languageEnglish
Title of host publicationProceedings of the 7th Asia-Pacific Workshop on Structural Health Monitoring, APWSHM 2018
EditorsZhongqing Su, Shenfang Yuan, Hoon Sohn
PublisherNDT.net
Pages250-258
Number of pages9
ISBN (Electronic)9783000603594
Publication statusPublished - 1 Jan 2018
Event7th Asia-Pacific Workshop on Structural Health Monitoring, APWSHM 2018 - Hong Kong, China
Duration: 12 Nov 201815 Nov 2018

Publication series

NameProceedings of the 7th Asia-Pacific Workshop on Structural Health Monitoring, APWSHM 2018

Conference

Conference7th Asia-Pacific Workshop on Structural Health Monitoring, APWSHM 2018
CountryChina
CityHong Kong
Period12/11/1815/11/18

Keywords

  • Fatigue crack
  • Nonlinearity of guided waves
  • Pipe inspection

ASJC Scopus subject areas

  • Biophysics
  • Mechanical Engineering

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