Stress intensity factors for internal circumferential cracks in thin-and thick-walled cylinders

摘要

This paper addresses the calculation of mode I stress intensity factors for complete circumferential cracks on the inner surface of a hollow cylinder subjected to axisymmetric loading. The analysis based on the weight function method involves tworeference sets of data. These are the stress intensity factor and the crack mouth opening displacement for a crack under uniform loading. Boundary-element computations are performed in order to extend the reference data available in the literature toinclude the cases of thin-walled cylinders and deep cracks. The derived weight function is valid for a wide range of cylinder inner and outer radii, 0.1≤R{sub}i/R{sub}o ≤ 1, and of the relative crack depth, a/t≤ 0.8. Its application provides thecomputation of stress intensity factors with an accuracy of about 3%.