Fatigue failure assessment of metallic specimens using the acoustic emission technique

Mazian Mohammad, Shahrum Abdullah, Nordin Jamaludin, Othman Innayatullah, Zulkifli Mohd Nopiah

Research output: Contribution to journalArticle

Abstract

This paper presents a process to determine the relationship between acoustic emission (AE) signals and the strain signal pattern for estimating material fatigue life. In addition, it establishes the usefulness of AE in predicting the fatigue life of metallic components. This study was carried out to investigate the relationship between the strain and AE signals to ensure that AE can also be used as a tool to predict the fatigue life of metallic specimens. Two types of sensors, i. e., the AE piezoelectric transducer and the strain gauge, were attached to SAE 1045 steel specimens during the fatigue cyclic test when the specimens were under constant loading. Two types of signals were obtained at three different applied loads (6.0 kN, 6.4 kN and 6.8 kN). Both signal types were then analyzed using a statistical model, and the results were used to correlate the fatigue life and AE signals. The fatigue life values were calculated using strain-life models. The correlation between the experimental and predicted values of fatigue life was then established. The results showed that the correlation between the r.m.s. AE values and the calculated fatigue life ranged from 74.0% to 98.5%, while the correlation between the kurtosis AE values and the predicted values was found to be between 95.0 % and 99.9%. These correlation values showed that the AE technique can be used to predict the fatigue life of metallic specimens.

Original languageEnglish
Pages (from-to)310-318
Number of pages9
JournalMaterialpruefung/Materials Testing
Volume55
Issue number4
Publication statusPublished - 2013

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Acoustic emissions
Fatigue of materials
Piezoelectric transducers
Steel
Strain gages
Sensors

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Fatigue failure assessment of metallic specimens using the acoustic emission technique. / Mohammad, Mazian; Abdullah, Shahrum; Jamaludin, Nordin; Innayatullah, Othman; Mohd Nopiah, Zulkifli.

In: Materialpruefung/Materials Testing, Vol. 55, No. 4, 2013, p. 310-318.

Research output: Contribution to journalArticle

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