Stress intensity factors for circumferential cracks in pipes analyzed by fem using line spring elements

✍ Scribed by M. Bergman; B. Brickstad

• Book ID: 104616956
• Publisher: Springer Netherlands
• Year: 1991
• Tongue: English
• Weight: 161 KB
• Volume: 47
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00037044

✦ Synopsis

Stress intensity factor solutions for internal circumferential surface cracks in pipes are of great technical importance. This geometry is often used in failure assessments of cracks found in, for instance, nuclear power plants. However, stress intensity factors are rarely presented in the literature for this geometry, especially for long cracks and the load case through thickness bending.

This note presents stress intensity factors for the load cases tension and through thickness bending. The geometries that have been considered are; the ratio of crack depth to wall thickness equal to 0.2, 0.4, 0.6 and 0.8, the ratio of crack depth to crack length equal to 0.05, 0.1, 0.25 and 0.5 and the ratio of wall thickness to internal radius equal to 0.1 and 0.2. The presented values of the stress intensity factor correspond to the deepest point of the crack.