Journal of Civil Engineering and Construction Technology
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Article Number - 06383BC63114


Vol.8(1), pp. 1-10 , January 2017
DOI: 10.5897/JCECT2016.0407
ISSN: 2141-2634



Full Length Research Paper

Qualitative analysis of fatigue crack behavior in welded connection using acoustic emission technique



Y. Luo
  • Y. Luo
  • Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang Jiangsu, 212013, China.
  • Google Scholar
A. Marfo*
  • A. Marfo*
  • Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang Jiangsu, 212013, China.
  • Google Scholar







 Received: 22 June 2016  Accepted: 29 August 2016  Published: 31 January 2017

Copyright © 2017 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


The study of fatigue crack behavior in welded structures using AE technique during crack initiation and propagation is discussed in this paper. This was achieved both theoretically and experimentally using four point bending testing. A new averaging index known as AE intensity was used to analyze the fatigue crack initiation conditions in the specimen. A theoretical model based on acoustic emission energy rate was developed to determine the critical fatigue level and crack extension. The results were compared with fatigue crack growth using a non-contact non-destructive testing method known as the digital imaging correlation. It was realized that, AE technique was able to detect the unset of a crack at a length of 8 μm in welded connection and 10 μm in the base metal, this proved that, crack initiates faster in welded connection than base metal.

Key words: Acoustic emission, fatigue, initiation, propagation, digital imaging correlation.

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APA Luo, Y., & Marfo, A. (2017). Qualitative analysis of fatigue crack behavior in welded connection using acoustic emission technique. Journal of Civil Engineering and Construction Technology, 8(1), 1-10.
Chicago Y. Luo and A. Marfo. "Qualitative analysis of fatigue crack behavior in welded connection using acoustic emission technique." Journal of Civil Engineering and Construction Technology 8, no. 1 (2017): 1-10.
MLA Y. Luo and A. Marfo. "Qualitative analysis of fatigue crack behavior in welded connection using acoustic emission technique." Journal of Civil Engineering and Construction Technology 8.1 (2017): 1-10.
   
DOI 10.5897/JCECT2016.0407
URL http://academicjournals.org/journal/JCECT/article-abstract/06383BC63114

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