Algorithm for automatic fatigue crack growth simulation on welded high strength steels

Baptista, R.; Infante, V.; Marques, João

doi:10.3221/igf-esis.48.27

Cited by 8 publications

(2 citation statements)

References 17 publications

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“…The reason why we conducted this study can be summarized as follows. For previous study, the theory of simulation is mainly based on the FEM, which needs to be remeshed when a crack grows [14,34]. It means that in each incremental step, the remeshing scheme is significant in order to acquire accurate results, which undoubtedly decreases computational power and increases technology difficulty.…”

Section: Discussionmentioning

confidence: 99%

“…This indicates that the a/c is related to the θ. According to related tests [34], when there was no change in the fatigue loads, boundary conditions, geometric dimensions of the joints, and materials, only slight differences were observed in the crack angles and crack dimensions. Meanwhile, the location where the cracks were initiated was also similar.…”

Section: Influence Of Initial Crack Dimensions On Fatigue Crack Growthmentioning

confidence: 99%

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High-Cycle Fatigue Crack Growth in T-Shaped Tubular Joints Based on Extended Finite Element Method

Lv,

Ding,

Zhang

et al. 2023

Buildings

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High fatigue load, which exists widely in steel building structures, likely leads to brittle failure at the joints, supports, and so on. This can lead to the partial or total damage of the structure and even to cause the collapse of the whole structure. This article aims to provide a method to simulate high-cycle crack propagation in tubular joints, which is one of the most common types occurring in steel structures. Firstly, sixteen T-shaped tubular joint models under different load conditions and initial crack dimensions were built through the coordinate mapping method. Secondly, based on the extended finite element method (XFEM), an algorithm was developed by combining the secondary development in Abaqus and a quasistatic simulation method to simulate high-cycle crack growth in tubular joints under a constant amplitude. The results of the simulations were compared with experimental data. The study found that the surface stress calculated from the tubular joint models using the coordinate mapping method was close to the experimental data. Through the comparison of the crack propagation rate and the crack growth process between the simulation and experiment results, the simulation method was validated. When a crack penetrated the tube wall, the difference in the load cycles between the simulations and the experiment was 9.5%. The initial crack dimension had an impact on the crack propagation, with the decrease in the a/c and KII generally becoming the dominant factor with respect to the crack growth, while the fatigue life of the joints tended to increase.

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Section: Discussionmentioning

confidence: 99%

Section: Influence Of Initial Crack Dimensions On Fatigue Crack Growthmentioning

confidence: 99%