Abstract
This paper reports steady-state stress distributions within the weld metal in a welded branch component, via detailed three-dimensional elastic-creep finite element analyses. The creep exponent and constants for the base and weld metal are systematically varied to simulate under-matching, even-matching and over-matching conditions in creep. Various loading conditions are also considered to see the effect of the loading mode. It is found that the mismatch effect in creep on steady-state stresses within the weld metal can be uniquely quantified by the mismatch factor, defined as a function of creep exponent and constant. Ratios of section-averaged (effective and maximum principal) stresses for the mismatched case to those for the even-matched case are linearly dependent on the mismatch factor.
Original language | English |
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Pages (from-to) | 238-251 |
Number of pages | 14 |
Journal | Fatigue and Fracture of Engineering Materials and Structures |
Volume | 33 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2010 Apr |
Keywords
- Creep mismatch
- Finite element analysis
- Steady-state stresses
- Welded branch junctions
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering