Defect Size Measurement of Wall Thinned Pipe Using Shearography and Digital Image Correlation

Abstract:

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Defect size of wall thinned pipe is measured by using Speckle Shearing Interferometry (SSI) and Digital Image Correlation (DIC) techniques. A wall thinned defect of a carbon steel pipe was typically caused by flow accelerated corrosion (FAC). As wall thinned pipe can cause a huge accident at the nuclear power plant (NPP), a wall thinned defect should be detected for structure safety. SSI is one of the optical nondestructive techniques and can provide to inspect in real-time and to measure on the whole visible area at a time. DIC is a kind of the visual testing method. This method which uses a stereo vision system can measure the deformation or strain/stress of a structure in 3D. In this paper, ASTM A106 Gr.B carbon steel pipe is used as specimen. When the pressure load is provided by the pressure pump, the out-of-plane deformation along the longitudinal direction of a pipe can be detected quantitatively. Both results of SSI and DIC experiments are compared.

Info:

Periodical:

Key Engineering Materials (Volumes 488-489)

Edited by:

Z. Tonković and M.H. Aliabadi

Pages:

494-497

DOI:

10.4028/www.scientific.net/KEM.488-489.494

Citation:

K. S. Kim et al., "Defect Size Measurement of Wall Thinned Pipe Using Shearography and Digital Image Correlation", Key Engineering Materials, Vols. 488-489, pp. 494-497, 2012

Online since:

September 2011

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Price:

$35.00

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