Fatigue resistance of welded steel tubular X-joints

Papatheocharis, Theocharis; Sarvanis, Gregory C.; Perdikaris, Philip C.; Karamanos, Spyros A.; Zervaki, A. D.

doi:10.1016/j.marstruc.2020.102809

Cited by 16 publications

(5 citation statements)

References 16 publications

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“…Based on these tests, a fatigue strength increase of about 10 % (FAT 126) compared with the currently valid S-N curve (FAT 114) was obtained with a comparatively low standard deviation of s N = 0.147 [18]. Similar results of fatigue tests on robot-welded tubular joints were published in [19] and [20].…”

Section: Articlesupporting

confidence: 65%

Improvements in the fatigue design of support structures for offshore wind turbines

2021

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Extended keynote paper of Eurosteel 2021 This article provides an overview of the various support structures for offshore wind turbines and addresses the challenges that arise for the different design variants. First of all, the existing types of support structures are explained and their benefits and shortcomings discussed. Following that, the focus is on material fatigue and its analysis, which is of great importance due to the cyclic loading on the structures. A central topic of this article is the experimental evaluation of fatigue strength using large‐scale test setups and state‐of‐the‐art measurement methods. Critical and complex design details such as welds for extremely thick plates, tubular joints, grouted connections, large HV bolts and ring flanges are investigated to improve methods of analysis. Further, the new series of German standards (DIN 18088) for support structures for wind energy turbines and platforms is addressed. Finally, these topics are summarized and the importance of offshore wind energy for the transition to cleaner energy is emphasized.

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Section: Articlesupporting

confidence: 65%

Improvements in the fatigue design of support structures for offshore wind turbines

2021

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“…Additionally, numerical analysis has emerged as another viable approach to delineate the stress distribution within cast-steel joints comprehensively. Finite element analysis results offer invaluable insights for cast-steel joint design, as evidenced by projects such as the Cycling Gymnasium for Beijing Olympic Games [13], Guangzhou New Railway Station [14], and Tianjin Convention and Exhibition Center [15]. Eurocode 3 presents the component method, facilitating the evaluation of joint stiffness and resistance characteristics by aggregating those of all constituent components [16,17].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation and simulation analysis of cast-steel joints under vertical pressure

Li,

Zhang,

et al. 2024

Preprint

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The joint made of cast steel is frequently utilized within a treelike column structure to ensure a smooth transition. It is of great significance in ensuring the overall structural safety, but currently, the mechanical property and bearing capacity of this type of joint cannot be fully understood. This study delves into the load-bearing characteristics of such a cast-steel joint featuring three branches. Initially, a comprehensive model of the cast-steel joint, sourced from a practical engineering, underwent vertical load testing. Detailed scrutiny of stress distribution and vertical displacement of the tested joint was conducted based on the experimental outcomes. Subsequently, a finite element model of the tested joint was constructed using SolidWorks and subjected to analysis via ANSYS. The numerical findings were juxtaposed with experimental data and extrapolated to encompass other parametric scenarios. Ultimately, a regression analysis method was employed to derive a calculation formula for the load-carrying capacity of branch-bearing cast-steel joints. This formula aids in estimating geometric parameters and load-bearing capacity during the preliminary design phase. Comparative analysis reveals a substantial concurrence among experimental, finite element analysis, and formula-based predictive outcomes.

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“…Besides the stress/strain parameters, researchers also developed data-driven models for predicting the fatigue life of welded/unwelded structures. [43][44][45] Post-processors are also developed to post-process the FE outputs to compute the fatigue life of structures. Nesl adek and Španiel wrote a post-processor to predict thermal/mechanical fatigue and creep life for the commercial FE software ABAQUS.…”

Section: Introductionmentioning

confidence: 99%

“…Besides the stress/strain parameters, researchers also developed data‐driven models for predicting the fatigue life of welded/unwelded structures 43–45 . Post‐processors are also developed to post‐process the FE outputs to compute the fatigue life of structures.…”

Section: Introductionmentioning

confidence: 99%

A post‐processing procedure for predicting high‐ and low‐cycle fatigue life of welded structures based on the master E–N curve

Liu

Lei

Xing

et al. 2023

Fatigue Fract Eng Mat Struct

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This work provides a post‐processing procedure to predict the high‐ and low‐cycle fatigue life of welded structures. The post‐processor calculates the equivalent structural strain range, given the traction stress state at the weld notch, by enforcing the equilibrium condition and Navier's hypothesis. The return mapping algorithm is applied to deal with the low‐cycle fatigue condition in which through‐thickness plastic deformation develops. The proposed method predicts the fatigue life of 793 welded joints of different configurations made from steel, magnesium, titanium, and aluminum alloy. The predicted high‐ and low‐cycle fatigue lives agree equally well with the experimental result.

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Fatigue resistance of welded steel tubular X-joints

Cited by 16 publications

References 16 publications

Improvements in the fatigue design of support structures for offshore wind turbines

Improvements in the fatigue design of support structures for offshore wind turbines

Experimental investigation and simulation analysis of cast-steel joints under vertical pressure

A post‐processing procedure for predicting high‐ and low‐cycle fatigue life of welded structures based on the master E–N curve

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