Effects of geometrical parameters on the degree of bending (DoB) in two-planar tubular DT-joints of offshore jacket structures subjected to axial and bending loads
Article
Article Title | Effects of geometrical parameters on the degree of bending (DoB) in two-planar tubular DT-joints of offshore jacket structures subjected to axial and bending loads |
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ERA Journal ID | 3795 |
Article Category | Article |
Authors | Ahmadi, Hamid (Author) and Niaki, Masoud Amini (Author) |
Journal Title | Marine Structures |
Journal Citation | 64, pp. 229-245 |
Number of Pages | 17 |
Year | 2019 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0951-8339 |
1873-4170 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.marstruc.2018.11.008 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0951833918303927 |
Abstract | The fatigue life of tubular joints commonly found in offshore structures is not only dependent on the value of hot-spot stress (HSS), but is also significantly influenced by the through-the-thickness stress distribution characterized by the degree of bending (DoB). In the present research, data extracted from the finite element (FE) analyses carried out on 81 two-planar tubular DT-joint models was used to study the effects of geometrical parameters on the DoB values in DT-joints subjected to six different types of loading including two types of axial loading, two types of in-plane bending (IPB) moment loading, and two types of out-of-plane bending (OPB) moment loading. Generated FE models were validated using available parametric equations. The determination of DoB values in a tubular joint is essential for improving the accuracy of fatigue life estimation using the stress-life (S-N) method and particularly for predicting the fatigue crack growth based on the fracture mechanics (FM) approach. Geometrically parametric investigation was followed by a set of nonlinear regression analyses to develop three DoB parametric formulas for the fatigue analysis and design of two-planar DT-joints. |
Keywords | Two-planar tubular DT-Joint, Fatigue, Degree of bending (DoB), Parametric equation |
ANZSRC Field of Research 2020 | 401504. Ship and platform structures (incl. maritime hydrodynamics) |
400510. Structural engineering | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Tabriz, Iran |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q791y/effects-of-geometrical-parameters-on-the-degree-of-bending-dob-in-two-planar-tubular-dt-joints-of-offshore-jacket-structures-subjected-to-axial-and-bending-loads
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