Abstract
The combined inherent residual stress (RS) from manufacturing and in-service loading acted on a bent pipe which could be exerted from the fluid flow and/or thermal loading, a common situation faced by main steam pipes in high temperature plants, needs to be considered to understand their overall impact on the integrity of the pipe. The geometrical influence on a bent pipe’s stress distribution was investigated using a combined RS – Fluid-Structure Interaction (FSI) finite element analysis approach. The reduced stresses along the pipe derived from the room temperature RS-FSI simulation and analysis demonstrated the impact of the fluid and structure interaction, particularly at the locations where geometry varied. A substantial reduction in the stress level observed, especially at the extrados where wall thinning was detected. The combined RS-FSI analysis therefore offers a more realistic approach in predicting a safe allowable stress, thus the integrity or life of bent pipes.
Original language | English |
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Pages (from-to) | 351-357 |
Number of pages | 7 |
Journal | Materials at High Temperatures |
Volume | 28 |
Issue number | 5 |
DOIs | |
Publication status | Published - 24 Aug 2021 |
Keywords
- bent pipe
- finite element
- fluid-structure interaction (fsi)
- residual stress