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

Kyeong Suk Kim; Chan Sik Park; Dong Pyo Hong; Man Yong Choi; Ho Seob Chang; Hyun Chul Jung

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

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The Effect of Nonlinear Matrix on Crack Propagation in the Particulate Composite
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On Effective Properties of Layers in Damaged Composite Laminates
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Defect Size Measurement of Wall Thinned Pipe Using Shearography and Digital Image Correlation
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Fatigue Focused Optimization of Treatment Parameters – A Case Study about Deep Cryogenic Treatment
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Fatigue Behaviour of Notched Ti-6Al-4V in Inert Environment
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A Comprehensive Study of the Performances of PVD WC/C-Coated Racing Gears
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Effect of Shot Peening on the Fatigue Behavior of some Sintered Steels
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Defect Size Measurement of Wall Thinned Pipe Using Shearography and Digital Image Correlation

Abstract:

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.