1 January 1991 Two-dimensional surface strain measurement based on a variation of Yamaguchi's laser-speckle strain gauge
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Abstract
A novel optical method of measuring 2-D surface strain is proposed. Two linear strains along orthogonal axes and the shear strain between those axes is determined by a variation of Yamaguchi's laser-speckle strain gage technique. It offers the advantages of shorter data acquisition times, less stringent alignment requirements, and reduced decorrelation effects when compared to a previously implemented optical strain rosette technique. The method automatically cancels the translational and rotational components of rigid body motion while simplifying the optical system and improving the speed of response.
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John P. Barranger, John P. Barranger, } "Two-dimensional surface strain measurement based on a variation of Yamaguchi's laser-speckle strain gauge", Proc. SPIE 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection, (1 January 1991); doi: 10.1117/12.51127; https://doi.org/10.1117/12.51127
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