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Influence of Shearing Amount on Detecting Crack-Shaped Internal Defect by Shearography

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Abstract:

Shearography, a type of speckle interferometry, is a powerful tool for nondestructive testing (NDT) because it is insensitive to environmental vibration disturbance and easy to detect strain concentration in an internal defect with noncontact and whole field. The shearing amount in Shearography has influence on determining defect size and source location. Thus the shearing amount must be optimally adjusted to get accurate evaluation. This paper investigates the defect size and source location according to the change of shearing amount in artificial slender defects along longitudinal direction of pipeline. Based on the investigation, a new technique is proposed for the quantitative determination of defect size and source location.

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Periodical:

Key Engineering Materials (Volumes 321-323)

Pages:

112-115

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.321-323.112

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Online since:

October 2006

Authors:

Ki Soo Kang, Koung Suk Kim, Hyun Chul Jung, Heo Sub Jang

Keywords:

Internal Defect, Pipeline, Shearing Amount, Shearing Direction, Shearography

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

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