Abstract
ABSTRACT Isoclinic parameter is one of the important parameters in (digital) photoelasticity. This paper presents a comparative study of two phase unwrapping methods for the parameter. The two phase unwrapping methods are a line-wise method and a semi-region-wise method. The paper focuses on the way that how the methods handle the wrapped isoclinic map(s), which is used to start unwrapping, having the edge-cut line and non-edge-cut line in the final or unwrapped isoclinic map. The edge-cut line and non-edge-cut line are the line of isoclinic jumps that link the points of discontinuity (isotropic points) with some points locating at the boundaries and inside the isoclinic map, respectively. For the evaluation, three models, the circular disk and ring under diametral compression and circular disk under three radial loads, were used. The comparative results show that the semi region-wise method is superior to the line wise method. Keywords: Digital photoelasticity, isoclinic parameter, line-wise phase unwrapping, semi region-wise phase unwrapping
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