Acoustic emission of metallic specimen with surface defect during fatigue crack growth

X. Yao, B. S. Vien, N. Rajic, L. R.F. Rose, C. H.J. Davies, W. K. Chiu

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

Acoustic emission is defined as the phenomena whereby transient elastic waves are generated by the rapid release of localized sources within a material. During fatigue crack growth, the formation of new crack surfaces is associated with a sudden release of energy, which constitutes acoustic sources for acoustic emission. This paper investigates the acoustic emission signature arising from fatigue test of a metallic specimen under tensile fatigue test. In this experimental study, dog-bone aluminium alloy specimen with a surface defect was fatigued to failure. It is found that the acoustic emission characteristics are different during the propagation of surface crack, because the source is changing. The results provide a useful guide in identifying source origin based on the characteristics of the acoustic emission waveform.

Original languageEnglish
Title of host publicationStructural Health Monitoring - 8th Asia Pacific Workshop on Structural Health Monitoring, 8APWSHM 2020, proceedings
EditorsN. Rajic, M. Veidt, A. Mita, N. Takeda, W.K. Chiu
PublisherAssociation of American Publishers
Pages95-104
Number of pages10
ISBN (Print)9781644901304
DOIs
Publication statusPublished - 2021
EventAsia-Pacific Workshop on Structural Health Monitoring 2020 - Cairns, Australia
Duration: 9 Dec 202011 Dec 2020
Conference number: 8th
https://www.monash.edu/engineering/shm (Website)

Publication series

NameMaterials Research Proceedings
Volume18
ISSN (Print)2474-3941
ISSN (Electronic)2474-395X

Conference

ConferenceAsia-Pacific Workshop on Structural Health Monitoring 2020
Abbreviated titleAPWSHM 2020
CountryAustralia
CityCairns
Period9/12/2011/12/20
Internet address

Keywords

  • Acoustic Emission
  • Fatigue Crack
  • Lamb Wave
  • Wave Propagation

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