Abstract
The total fatigue life (Nf) is considered to be the sum of fatigue initial life (Ni) and propagation life (Np). In this study, the fatigue tests were carried out with the use of butt welded joints and base metal test specimens to evaluate Np. The growth rate(da/dN-ΔK) of embedded cracks in thickness direction did not agree with that in weld bead direction when nominal stress are adapted. This is attributed mainly to stress concentration effect arising from geometrical irregularities of weld reinforcement. The degree of the stress concentration affect growth rate and the proportion of Ni to Nf are discussed. Finally, referring to the test results, the size of initial flaw of butt welded joints is purposed.
| Original language | English |
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| Pages | 39-44 |
| Number of pages | 6 |
| Publication status | Published - 1998 Jan 1 |
| Event | Proceedings of the 1998 8th International Offshore and Polar Engineering Conference. Part 3 (of 4) - Montreal, Can Duration: 1998 May 24 → 1998 May 29 |
Other
| Other | Proceedings of the 1998 8th International Offshore and Polar Engineering Conference. Part 3 (of 4) |
|---|---|
| City | Montreal, Can |
| Period | 98-05-24 → 98-05-29 |
All Science Journal Classification (ASJC) codes
- Energy Engineering and Power Technology
- Ocean Engineering
- Mechanical Engineering