V-notches are the most possible case for initiation of cracks in engineering structure. Cracks on the notch tip can be characterized by opening angle, tip radius, and depth of the V-notch. In this study, the effects of V-notch's opening angle on stress intensity factor and on T-stress of the crack have been investigated in detail. Our calculation has been performed in a number of opening angles and various crack lengths in mode I loading using photoelasticity method. We show that as opening angle grows at constant crack's length, SIF and T-stress decrease. Furthermore, as the crack's length increases, the V-notch effect diminishes and the crack behavior can be considered as a single-edge crack specimen. Finally, the obtained results were found to be in good agreement with outcome of numerical finite element analysis.
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