Abstract
Application of high-strength steels in the maritime and offshore industry is currently limited by rules governing the ratio of the yield to tensile strength (the Y/T ratio). To better understand the physical basis for these rules, the nature and extent of the plastic stress/strain field in the vicinity of a stress concentration (a circular hole) in a structure made from high-strength steel are analyzed. This is done through analytical models of the stress field and the extent of plasticity in the vicinity of a hole based on classical methods. These analytical methods are validated through FEA models that are in turn validated by published experimental data. This paper concludes that a high Y/T ratio leads to a lower plastic SCF and a higher local strain in the vicinity of a hole. The extent of the plastic zone is not affected by different values of Y/T ratio for different values of σnom/σy.
Original language | English |
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Article number | 103205 |
Number of pages | 12 |
Journal | Marine Structures |
Volume | 84 |
DOIs | |
Publication status | Published - 2022 |
Keywords
- Elasto-plastic
- SCF
- Ultra high-strength steels
- Y/T