2008•Journal of the Korean Society for Nondestructive TestingRequires access
Quantitative Comparison of Out-of-Plane Deformation Measured by Dual-Function Interferometer System
Kyoung-Suk Kim, Ho-Seob Chang, Seung‐Seok Lee, Hyunchul Jung, Jae-Ho Kwag
Open publisher page 2 citations
Abstract
Dual-function interferometer is an interferometer that has all features of ESPI (electronic speckle pattern interferometry) and shearography in one interferometer setup. The deformatiou of an object is directly obtained by ESPI while the slope of the deformation of an object is obtained by shearography. If the result of shearography is divided by shearing amount and integrated by numerical analyzing, then finally the reconstructed deformation of an object that is the same as the results directly obtained by ESPI can be measured by shearography. In this study, rubber and alruminum plates are used as specimen and its out-of-plane deformation is measured by ESPI and shearography setup of the dual-function interferometer. Each of the results obtained by ESPI and shearography is compared by using numerical integration to the result of shearography. From this study, it is confirmed that the reconstructed deformation results obtained by numerical integration good agree with the results obtained by ESPI.