Abstract
AbstractThe subcritial growth of semi‐elliptical surface cracks in the front face of a cylindrical disk was calculated. The disk represents a part of a turbine rotor. The stress intensity factors, which are the basis for the calculations presented here, were given in a former paper [1]. The loads steps considered consist of an inhomogeneous hoop stress distribution, which occurs at a distinct time‐step of the start – up procedure of the turbine, and of the stress free state, respectively. By use of a Paris‐law the growth of different initial cracks was evaluated under the assumption that the crack geometry remains semi‐elliptic.
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