Study on FAD curves of steel pipes based on stress-strain curves

Wang, Xu; Shuai, Jian; Lv, Zhiyi

doi:10.1016/j.tafmec.2019.102451

Cited by 6 publications

(3 citation statements)

References 20 publications

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“…The FAD has most recently been utilised for pipeline integrity [42], evaluating a cracked pipe using the FAD construction built on the curve of stress−strain. In addition, in [41], they modelled a pipe with an external defect to build the FAD, and the modelling was done by the CFEM using CASTEM software.…”

Section: Numerical Procedures and Resultsmentioning

confidence: 99%

Analysis of Crack Behaviour in Pipeline System Using FAD Diagram Based on Numerical Simulation under XFEM

et al. 2020

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For a long time, cracked structures have triggered various researchers to develop a structural integrity approach and design models to address the fracture problems. In the present study, a pipeline with an axial semi-elliptical surface defect was examined in detail. Recent works have highlighted the use of the classical finite element method (CFEM) as numerical tools to solve the fracture mechanics; however, this approach comes with a few difficulties in the modelling aspects. To overcome this issue, we proposed the use of the extended finite element method (XFEM), which was implemented in the commercial version of Abaqus software. Moreover, we have used the results based on this technique in the volumetric method to estimate the stress intensity factors (SIFs). Then, this parameter was employed to build the failure assessment diagram (FAD). The FAD curve was used in the current investigation because it is one of the conventional methods for the evaluation of flaws in steel pipes. The XFEM simulations enable us to draw an FAD curve that can be used as a practical reference for defect evaluation in pipeline systems in the industrial world.

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Section: Numerical Procedures and Resultsmentioning

confidence: 99%

Analysis of Crack Behaviour in Pipeline System Using FAD Diagram Based on Numerical Simulation under XFEM

et al. 2020

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“…where, E is Young's modulus, ε Y is the yield strain, and ε Y ¼ 0:005. Under the assumption that the volume is incompressible (Wang et al, 2020), Eq. ( 1) can be transformed into:…”

Section: Methodsmentioning

confidence: 99%

“…The strain hardening coefficient a and strain hardening exponent n are calculated referring to Eqs. ( 2) and (3) (Wang et al, 2020). In the following material parameter sensitivity analysis, 7 cases for varying M values (0.85 $ 1.15) and 3 cases for varying S values (0.85 $ 0.95) were considered.…”

Section: Methodsmentioning

confidence: 99%