Investigation of shear distance in Michelson interferometer-based shearography for mechanical characterization

Abstract : Shearography is a growing industrial field in both quantitative mechanical characterization and relatively qualitative non-destructive testing. In shearography, shear distance is the most important parameter to control measurement performances. In this paper, the role of the shear distance is systematically investigated, focusing on the application of full-field mechanical characterization. A modified Michelson interferometer is considered as the shearing device, which is most commonly adopted for mechanical characterization applications because it enables easy and precise shearing and phase shifting. This paper also includes theoretical and experimental investigations of the relationship between shear distance and performance issues such as the immeasurable zone in the target with discontinuity, signal-to-noise ratio, sensitivity and shear distortion. In addition, this study is verified with actual shearographic results and a phase-shifting grid method capable of full-field displacement evaluation in the submicrometer regime.
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Measurement Science and Technology, IOP Publishing, 2008, 19 (11), pp.115303. 〈10.1088/0957-0233/19/11/115303〉
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https://hal-emse.ccsd.cnrs.fr/emse-00502100
Contributeur : Anna Fraczkiewicz <>
Soumis le : mardi 13 juillet 2010 - 11:02:15
Dernière modification le : jeudi 22 février 2018 - 13:06:06

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Jung-Ryul Lee, Dong Jin Yoon, J.S. Kim, Alain Vautrin. Investigation of shear distance in Michelson interferometer-based shearography for mechanical characterization. Measurement Science and Technology, IOP Publishing, 2008, 19 (11), pp.115303. 〈10.1088/0957-0233/19/11/115303〉. 〈emse-00502100〉

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