The Determination of Stress-Intensity Factors K_I for Compact-Tension Specimens

Stress-intensity Factor K_I value for specimens of Compact-tension was determined by photoelastic technique. The simulated cracks of specimens were made manually. The maximum shearing stress was obtained from isochromatic fringe. The experimental values K_I were determined by the Taylor series correction method (TSCM) on the principle of least square. This accuracy meets the requirements of engineering problems.