Computational hybrid phase shifting technique applied to digital photoelasticity

Conventional phase shifting techniques have emerged as a powerful tool for evaluating the stress field in digital photoelasticity. However, the quantity of image acquisitions they require makes the process complex and tedious. In this paper, a computational hybrid method was developed for reducing the quantity of the image acquisitions in conventional phase shifting techniques. This study provides a novel approach to complete the set of acquisitions by performing some of them experimentally and simulating the remaining computationally. The accuracy of the results demonstrated that conventional phase shifting techniques could evaluate the stress field by performing fewer acquisitions and integrating computational procedures. These achievements represent a further step towards evaluating time-varying phenomena since the reduction of the acquisition time.