Hybrid Stress Analysis of Viscoelastic Body Using Photoviscoelastic Birefringence

The stress and strain in the viscoelastic body calculated numerically are not very reliable because it is difficult to optimize the modeling of the analytical object. The method of numerical and experimental hybrid stress analysis in the viscoelastic body is proposed in this paper. In this hybrid method the photoviscoelastic birefringence obtained from the stress and strain calculated numerically and the experimental one measured by the photoviscoelastic technique are compared in obtaining high reliability of the numerical results. As a concrete example, the thermal stress generated in the epoxy resin beam, when it is rapidly cooled from high temperature, is analyzed by this hybrid method.