Grating Method - A New Technique For Strain Measurement

Y. W. Qin; Y. Y. Wang; Y. Y. Hung

doi:10.1117/12.947668

14 December 1988 Grating Method - A New Technique For Strain Measurement

Y. W. Qin, Y. Y. Wang, Y. Y. Hung

Proceedings Volume 0955, Industrial Laser Interferometry II; (1988) https://doi.org/10.1117/12.947668
Event: SPIE International Symposium on Optical Engineering and Industrial Sensing for Advance Manufacturing Technologies, 1988, Dearborn, MI, United States

Abstract

In this paper a new technique is presented. Using grating strain method, we can directly obtain the amount of strains. It does not need to be shock-proof and any darkroom, which is convenient to strain measurement on spot, and it is also very easy tc measure and take the experimental data as well as to treat them. We use a prefabricated orthogonal grating as strain rosette, and then stick it on the surface of the object measured. It can measure directly the value of strain of 2 orthogonal lines on all points of the object and a shear strain. So we may obtain the value and direction of the main strain and main stress on all points. The orthogonal grating is made by means of holographic interferometry.

Citation Download Citation

Y. W. Qin, Y. Y. Wang, and Y. Y. Hung "Grating Method - A New Technique For Strain Measurement", Proc. SPIE 0955, Industrial Laser Interferometry II, (14 December 1988); https://doi.org/10.1117/12.947668

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