engleski

A Proposition for Shadow Optical Constants Measured in Photoelastic Materials

Shadow optical constants exist in the basic equation of caustics for mode I loading conditions. They are given, as well as the coefficient of optical anisotropy, especially for the cases of plane stress and plane strain conditions. The connection of constant c and photoelastic constant makes possible the application on the mixture of those two conditions, where pure states are included. Also, this procedure requires measuring of only one material constant while the usual way needs the elasto-optical constants. Poisson's ratio, Young's modulus and refractive index of light. The main request of this method is the great accuracy of caustic diameter measurement, and this is also the imperative for the precise determination of the stress intensity factor.

optical method of caustics; shadow optical constants; photoelastic material

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