COMPARATIVE STUDY OF CRACK INITIATION ANGLE USING K BASED APPROACH UNDER MIXED MODE (I/II) FRACTURE

Abstract

The research on the mixed fracture criterion and crack growth is significant in fracture mechanics and engineering. Present study deals with the prediction of crack initiation angle under mixed mode (I/II) fracture using finite element using K based approach. The FE code “ANSYS” is used to estimate the stress intensity factor (K) numerically. Single edge crack specimens were used for the present analysis. Constant load was applied to all the specimens containing crack at angles of inclination to 0°, 15°, 30°, 45° and 50°. The crack initiation angle obtained using based approaches are close to analytical determination and also found to be in good agreement with the available experimental results in literature. It is also investigated thast as crack inclination angle increases, material was found to behave in a brittle manner.