During recent years the fracture mechanics has obtained a special importance for predicting the material behavior under static and dynamic loading situation. This paper deals with experimental analysis of properties of photoelastic material which are used for stress-strain analysis on photo elastic bench. Both polyamine and oolyamide type hardeners and epoxy resins, mixed in suitable ratio are being used as photoelastic model materials. The optical and mechanical properties of the materials necessary for photoelastic study are the refractive index and material fringe value. The required mechanical properties are the modulus of elasticity and proportional limit. The opto-mechanical properties of the material involves the figure of merit and the sensitivity index. The deformation of photoelastic material be as small as possible and the number of obtainable fringes should be high for accurate measurement of stress-strain at any point of specimen for fracture analysis. In order to investigate the effect of the hardener on the above stated properties, experimental study has been carried out and a new methodology is developed for image processing and data collection from the isochromatic fringe pattern of the specimen. In this context, the above mentioned properties are determined and some interesting results are plotted and conclusion are drawn.
