Development of the obliwue incidence method based on the light scattering phenomenon

General relationships for photoelastic investigations in the form of a system of equations containing components of a stress tensor and parameters of a light field running through the tested medium have been formulated in this paper.

Investigations are carried out on the basis of the oblique incidence method together with the observation of scattered light.

A description of a plane electromagnetic wave in anisotropic medium is presented in appendix 1. This analysis has been adopted for photoelastic needs and combined with the concept of stresses optically active (secondary principal stresses).

Appendix 2 contains the experimental part of the work. Results of the experimental and the analysis of the error prove the assumed relationships correctness and the generality of the method.

This paper is the starting point for the analysis of the compound states of stress.