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- Title
An extrapolation method to determine the effective notch stress in circular hollow section X-joints.
- Authors
Pradana, M. R.; Qian, X.; Swaddiwudhipong, S.; Shen, W.
- Abstract
This paper presents an extrapolation method to determine the effective notch stress (ENS) on the weld toes of welded circular hollow section (CHS) X-joints in-line with the extrapolation method to determine the structural hot-spot stress in existing design guidelines. This investigation verifies and extends the recently proposed ENS extrapolation scheme to CHS X-joints, which elevates significantly the difficulty in generating a weld toe radius along the brace-to-chord intersection as required in existing guidelines. An extensive numerical study then investigates the ENS extrapolation for CHS X-joints under three loading conditions, namely, the brace axial load, the brace in-plane bending load, and the brace out-of-plane bending load. The numerical study derives a set of recommended extrapolation parameters that ensures accurate ENS estimation for each loading condition. This paper demonstrates that the proposed extrapolation method for the CHS X-joints yields good agreement with the standard ENS calculation procedure described in the International Institute of Welding (IIW) guideline.
- Subjects
MECHANICAL stress analysis; EXTRAPOLATION; FATIGUE life; AXIAL loads; WELDING
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2017, Vol 40, Issue 2, p160
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.12476