Project Number | 49 |
Date of Summary | March 31, 1987 |
Subject | Fitness-for-Service Criteria for Assessing the Significance of Fatigue Cracks in Offshore Structures |
Performing Activity | National Bureau of Standards |
Principal Investigator | Dr. Harry I. McHenry & Dr. Yi-Wen Cheng |
Contracting Agency | Minerals Management Service |
Estimated Completion | Complete |
Description | The objective was to develop guidelines for evaluating defects found during in-service inspection of offshore structures. The approach is based on fracture mechanics methods where the key ingredient in the assessment methodology is a semi- empirical model, relating crack growth rate to anticipated operating conditions. Various models developed for predicting growth rates of cracks under random loading will be studied by comparing analytical predictions with experimental results on growth of surface cracks in representative offshore steel weldments. This is a companion study to Project No. 37. |
Progress | Complete. The project is complete with the final report presented as NBS Technical Note 1088. |
Reports | |
AA (16 pages) | Read, D. T., Cheng, Y. W., An Automated Fatigue Crack Growth Rate Test System, Proceedings; Symposium on Automated Test Methods for Fracture and Fatigue Crack Growth, ASTM, November 1983. |
AD (18 pages) | Li, P. N., Estimation of Irregularity Factor From a Power Spectrum, NBS Report, National Bureau of Standards, Boulder, Colorado, September 1984. |
AE (26 pages) | Cheng, Y. W., Spectrum-Loading Fatigue-Crack Growth for a Ship Steel in Saltwater, International Journal of Fatigue, London, England (To be published). |
AF (128 pages) | Cheng, Y. W., Fitness-for-Service Criteria for Assessing the Significance of Fatigue Cracks in Offshore Structures, Interim Progress Report, National Bureau of Standards, Boulder, Colorado, February 1985. |
AG (6 pages) | Cheng, Y. W., The Fatigue Crack Growth of a Ship Steel in Seawater Under Spectrum Loading, International Journal of Fatigue, pp. 95- 100, April 1985. |
AH (72 pages) | Cheng, Y. W., Fitness-for-Service Criteria for Assessing the Significance of Fatigue Cracks in Offshore Structures, NBS Technical Note 1088 National Bureau of Standards, Boulder, Colorado, August 1985. |
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