Abstract
Fracture of blades or disks due to centrifugal force in rotary machines has often caused serious accidents. To estimate the strength of a structure, a precise knowledge of stress intensity factors for the mixed mode in rotating disks is important. In this paper, stress intensity factors KI and KII has been determined by using the photoelastic and caustics method, as a function of the inclination crack of length 2 a (2a = 4, 8, 12, 16, 21 mm) and at different values of the inclination crack angles φ(φ = 0, 15, 30, 45, 60, 75, 90°) at a velocity of 2 100 rpm. The results of these experimental methods coincided favorable with the theoretical analysis results of Ishida and Terada.
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