RGB photoelastic method based on gradient-square inversion correction

Abstract

Abstract Automatic photoelastic method focuses on the recognition of stress field. RGB photoelastic method has the advantages of low condition requirements and accurate low-level fringe recognition, but it is easy to be disturbed by image noise, color repetition and other factors, resulting in recognition errors. In this study, the combination of gradient-square inversion and RGB photoelastic technology can not only effectively eliminate the error points introduced by color repetition, but also greatly reduce the scope of look-up table, shorten the calculation time and quickly analyze the stress field. The effectiveness of the proposed RGB photoelastic method based on gradient-square inversion correction is verified by photoelastic experiments.