An external axial surface flaw in a metallic round pipe subjected to an internal pressure or various types of stress distributions on the crack faces is considered. The longitudinal surface defect is assumed to have an elliptical-arc shape with the ellipse aspect ratio changing during the whole propagation, as has been deduced through several experimental investigations. The ratio R* = R / t between the inner radius and the wall thickness of the pipe is equal to 1 (thick-walled pipe). The stress-intensity factor along the crack front is derived by applying the finite element method. Then a numerical simulation procedure is carried out to predict the crack growth under cyclic internal pressure. Some results are compared to those determined by other authors.
Fatigue growth of external axial surface cracks in hollow cylinders / Carpinteri, Andrea; Brighenti, Roberto; Spagnoli, Andrea. - (1999), pp. 183-188. (Intervento presentato al convegno 8th International Conference on Mechanical Behaviour of Materials (ICM8) tenutosi a Victoria (British Columbia), Canada).
Fatigue growth of external axial surface cracks in hollow cylinders
CARPINTERI, Andrea;BRIGHENTI, Roberto;SPAGNOLI, Andrea
1999-01-01
Abstract
An external axial surface flaw in a metallic round pipe subjected to an internal pressure or various types of stress distributions on the crack faces is considered. The longitudinal surface defect is assumed to have an elliptical-arc shape with the ellipse aspect ratio changing during the whole propagation, as has been deduced through several experimental investigations. The ratio R* = R / t between the inner radius and the wall thickness of the pipe is equal to 1 (thick-walled pipe). The stress-intensity factor along the crack front is derived by applying the finite element method. Then a numerical simulation procedure is carried out to predict the crack growth under cyclic internal pressure. Some results are compared to those determined by other authors.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.