Stress Intensity Factor Solution Comparison for Very Long Circumferential Flaws in Cylinders Using Finite Element Analysis
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Bibliographic record
Abstract
Abstract Section XI of the ASME Boiler and Pressure Vessel Code provides analytical evaluation procedures to determine the acceptability of flaws detected during in-service inspection of structural components and piping. Linear elastic fracture mechanics-based evaluation procedures require calculation of the stress intensity factor. Article A-3000 of Appendix A in Section XI provides closed-form relations for the stress intensity factor influence coefficients at both the deepest and surface points of the flaw, which were developed based on tabular data in API 579-1/ASME FFS-1 2007. The API 579-1/ASME FFS-1 2007 data do not cover very long flaws, e.g., flaws close to being fully circumferential flaws. Stress intensity factor solutions are provided by separate equations for fully circumferential flaws in Article A-3000, but there is no guidance on evaluating very long flaws that are beyond the current closed form solutions and still fall short of being fully circumferential. Finite element calculations have been performed to obtain stress intensity factors for very long circumferential flaws in cylinders. The finite element results are used to assess the applicability of the current closed-form relations in Section XI Appendix A to very long circumferential flaws on the inside and outside surfaces of cylinders. The paper presents the finite element results and assessment of the applicability of the current Section XI equations.
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| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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