Evaluation of Fracture Mechanics Parameters for Mixed Mode Crack using Digital Image Correlation Method

Abstract

Cracks in mechanical structures lead to serious destruction accidents. High precision detection of cracks and evaluation of mechanical parameter of crack are important issues in order to prevent destruction accidents beforehand. In this research, we developed a crack detection method by digital correlation method which can evaluate the strain distribution from the surface image. With this method, stress intensity factors for mode I and mode II can be evaluated from the surface.