New J and COD estimates for thin-walled pipes with axial through-wall cracks and high strain hardening exponents

Surh, Han-Bum; Jang, Youn-Young; Kim, Se-Chang; Shim, Do-Jun; Huh, Nam‐Su

doi:10.1016/j.tafmec.2017.03.001

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…A review of published literature (e.g., Surh et al 2017;Cho et al 2011;Kim et al 2004;Lei 2004;Kumar et al 1984Kumar et al ,1981 shows that considerable research has been undertaken to determine the J-integral for cracked pipes made of ductile or elastoplastic materials. For example, the solutions to J-integral for through-wall cracks and continuous (full-length) partthrough cracks in pipes were developed by the General Electric/Electric Power Research Institute (GE/EPRI) based on shell line-spring finite element (FE) models.…”

Section: Introductionmentioning

confidence: 99%

“…The results of these solutions are well documented in EPRI-NP-1931 (Kumar et al 1981) and EPRI-NP-3607 (Kumar et al 1984). Other researchers, e.g., Park et al (2019), Surh et al (2017), Jeong et al (2016) and Kim et al (2001Kim et al ( , 2002aKim et al ( , 2002b, further extended the existing solutions to J-integral for through-wall cracks in pipes under various loading conditions. As the crack-like defects…”

Section: Introductionmentioning

confidence: 99%

“…The review also shows that most of current research (e.g., Park et al 2019;Surh et al 2017;Cho et al 2011;Kim et al 2004) used the reference stress (RS) method to estimate the elastoplastic J integral for cracked structures. This is because the GE/EPRI method cannot determine the J-integral accurately when the materials do not follow stress-strain law of Ramberg-Osgood (R-O) (EDF Energy 2015).…”

Section: Introductionmentioning

confidence: 99%

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A new method to determine elasto-plastic J-integral for steel pipes with longitudinal semi-elliptical surface cracks

Wang

Yang

et al. 2020

Engineering Failure Analysis

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Steel pipes have been widely used in the water and petroleum industries where crack-like flaws have long been recognised as a major cause of their failures. This paper intends to develop a new method for determining the elasto-plastic J-integral of cracked pipes made of all types of steel. A solution to elasto-plastic J-integrals is derived for external longitudinal semi-elliptical surface cracks in pressurised steel pipes. A meshing technique is developed in the detailed threedimensional finite element analysis that incorporates the mixed types of quadratic tetrahedron and hexahedron elements. The developed method is verified with detailed finite element results.It is found in the paper that the general trend of normalised fully plastic J-integral changes with the change of crack depths and aspect ratios, and the magnitude of normalised fully plastic Jintegrals can be significantly affected by material properties and pipe dimensions. The developed method can provide a useful tool for the failure assessment of pressurized steel pipes, allowing for a wide range of pipe dimensions, crack geometries and material properties.

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