Reliability of welded structures containing fatigue cracks
- Ohio State Univ., Columbus, OH (United States). Dept. of Aerospace Engineering, Applied Mechanics and Aviation
This study investigates the reliability of a cracked fillet welded T-joint typically found in offshore structures. A formulation for the aspect ratio (a/c) of a propagating semi-elliptical fatigue crack located at the toe of the weld is developed using Newman and Raju`s stress intensity factor for a cracked flat plate in conjunction with a weld magnification factor. The reliability in terms of fatigue lifetime is then calculated using the aspect ratio and Paris`s law of crack propagation with both fracture toughness and elastic-plastic failure criteria. The variation in crack aspect ratio in the T-joint is compared to that in a cracked flat plate, and examples are provided of reliability calculations for tension and bending loads.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 415691
- Journal Information:
- Journal of Offshore Mechanics and Arctic Engineering, Journal Name: Journal of Offshore Mechanics and Arctic Engineering Journal Issue: 4 Vol. 118; ISSN 0892-7219; ISSN JMOEEX
- Country of Publication:
- United States
- Language:
- English
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