Abstract
A method that employs the combination of photoelastic experiments and finite element analysis (FEA) is developed for extracting zero points. This method is divided into two parts. One is to confirm the boundary condition necessary for FEA using isochromatics obtained by photoelastic experiments. The other is to determine zero points using simulated isochromatics and principal-stress vectors obtained by FEA under the boundary condition confirmed by photoelastic experiments. The method is applied to rings with different inner diameters subjected to a compressive load. The results show that the zero points moving in the rings can be accurately extracted by the method.
