Abstract
This paper presents the results of a structural integrity assessment of a large-scale test undertaken as part of the EU programme STYLE on a repair welded pipe containing a circumferential through-thickness crack. The pipe was manufactured from two Esshete 1250 stainless steel pipes joined by a girth weld containing a deep repair. A through-thickness circumferential pre-crack was introduced to the centre of the repair prior to testing in four-point bend. The assessment used a finite element model created in Abaqus, with the weld residual stress introduced by an iterative technique. Linear elastic fracture mechanics was used to evaluate the stress intensity factor KI for the defect and elastic-plastic analyses were performed to characterise the crack driving force J along the crack front. The predicted crack mouth opening displacement as a function of load was compared with the test results and the derived variation in J used to predict crack initiation and growth. The results predicted the global behaviour of the test to within approximately 7% at final load, and the position of maximum crack growth. However, the final extent of crack extension is under-predicted. Reasons for this underprediction are suggested.
Original language | English |
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Title of host publication | ASME 2014 Pressure Vessels and Piping Conference |
Place of Publication | Anaheim, California, USA |
Publisher | American Society of Mechanical Engineers |
Number of pages | 11 |
Volume | 3 |
DOIs | |
Publication status | Published - Jul 2014 |
Event | Proceedings of the ASME 2014 Pressure Vessels & Piping Conference (PVP2014) - Duration: 20 Jul 2014 → 24 Jul 2014 |
Conference
Conference | Proceedings of the ASME 2014 Pressure Vessels & Piping Conference (PVP2014) |
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Period | 20/07/14 → 24/07/14 |
Keywords
- Simulation
- Fracture (Materials)
- Finite element analysis
- Cylinders