Early fatigue crack shape development in welded tubular joints
Conference
·
OSTI ID:205409
- Memorial Univ. of Newfoundland, St. John`s, Newfoundland (Canada). Centre for Cold Ocean Resources Engineering
- University College, London (United Kingdom). Dept. of Mechanical Engineering
Electromagnetic-based non-destructive testing techniques are used to monitor the growth and interaction of small surface fatigue cracks in welded tubular joints. The stress fields surrounding each joint are also analyzed using strain gauge rosettes. Crack growth trends are found to have a strong dependence on the geometric surface stress distribution around the brace-chord intersection. A correlation between the average geometric surface stress and the peak aspect ratio is used to derive an empirical forcing function for predicting early crack shape development behavior. Model predictions are compared with actual test results for the cases of IPB and OPB in multi-brace tubular T- and Y-joints.
- OSTI ID:
- 205409
- Report Number(s):
- CONF-950695--; ISBN 0-7918-1309-6
- Country of Publication:
- United States
- Language:
- English
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