Proposed updates to the buried-to-surface flaw characterization rules in the Annex E of BS 7910
BS 7910 “Guide to Methods for Assessing the Acceptability of Flaws in Metallic Structures” is undergoing revision for the 2019 edition. Updates are proposed for the Annex E flaw recharacterization guidance. The changes aim to make Annex E more applicable to real structures and to improve the synergy...
| Main Authors: | , , , |
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| Format: | Other Non-Article Part of Journal/Newspaper |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | http://hdl.handle.net/1983/10fac366-5af1-461f-92e7-3a1dae7585e3 https://research-information.bris.ac.uk/en/publications/10fac366-5af1-461f-92e7-3a1dae7585e3 |
| Summary: | BS 7910 “Guide to Methods for Assessing the Acceptability of Flaws in Metallic Structures” is undergoing revision for the 2019 edition. Updates are proposed for the Annex E flaw recharacterization guidance. The changes aim to make Annex E more applicable to real structures and to improve the synergy between the subcritical crack growth such as by fatigue and fracture of a buried flaw. Several studies were done by WEE/37 fracture panel focusing on brittle and ductile material behaviour to support the changes. These studies are summarised in the paper. The main modifications in the proposed updated Annex E are in: • Removal of use of Annex E for brittle fracture. • Updated guidance on recharacterized surface flaw length for ductile fracture. • Guidance on use of geometry-based criterion for buried flaw break-through under ductile conditions. • Synergy of fatigue crack growth in Section 8 with the flaw break-through in Annex E. |
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