Review of RGB photoelasticity |
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| Affiliation: | 1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology at Beijing, D11 Xueyuan RD, Beijing, 100083, China;2. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology at Xuzhou, 1 University Ave, Xuzhou, 221006, China;3. School of Mechanics and Civil Engineering, China University of Mining & Technology at Beijing, D11 Xueyuan RD, Beijing, 100083, China;4. Department of Mechanical Engineering, Stony Brook University, NY, 11794-2300, USA |
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| Abstract: | Automatic methods of photoelasticity have had a significant progress with the development of automatic acquisition and image processing methods. This article concerns RGB photoelasticity, which allows the determination of the photoelastic retardation using, usually, a single acquisition of the isochromatic fringes in white light by a colour camera. In particular, the article presents an overview of the main characteristics of RGB photoelasticity that is influence of the quarter-wave plate error, number of acquisitions, type of light source, determination of low and high fringe orders, methods for searching the retardation, scanning procedures, calibration on a material different from that under test, combined use of the RGB and phase shifting methods. A short section on the applications of RGB photoelasticity completes the article. |
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| Keywords: | RGB photoelasticity Image acquisition and elaboration Experimental mechanics |
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