Theoretical Basis for the Photoelastic Residual Stress Evaluation in Misaligned Cubic Crystals

Photoelasticity is a fast and powerful technique for internal stress detection quality control in crystals; to fully exploit its possibilities, an appropriate theoretical analysis must be developed different crystallographic structure observation planes. For cubic crystal specimen whose geometry non-coherent with directions (i.e., planes are not parallel), we write set of equations that allow estimate the refraction indices as function residual stress. This obtained upon assumption may represented by plane parallel face. crystals, obtain explicit intensity; this can achieved provided know piezo-optic tensor component, orientation two non-parallel faces respect axes, measure principal refractive on