| Abstract: | Stress intensity factors based on linear elastic behaviour were calculated for semi-elliptical surface cracks in the front face of a cylindrical disk. The small semi-axis of the cracks coincides with the axis of rotation of the disk. The disk represents a part of a turbine rotor and is used to simplify the calculations. The uncracked rotor is loaded by a radial varying hoop stress distribution, caused by rotation, thermal gradients and the influence of the turbine blades. Following a procedure proposed by Mattheck at al. 1] the stress points of the cracks were calculated by means of the weight functions method. |
