Ductile failure analysis of API X65 pipes with notch-type defects using a local fracture criterion

Chang Kyun Oh; Yun Jae Kim; Jong Hyun Baek; Young Pyo Kim; Woo Sik Kim

doi:10.1016/j.ijpvp.2007.03.002

Ductile failure analysis of API X65 pipes with notch-type defects using a local fracture criterion

Chang Kyun Oh, Yun Jae Kim, Jong Hyun Baek, Young Pyo Kim, Woo Sik Kim

Research output: Contribution to journal › Article › peer-review

110 Citations (Scopus)

Abstract

A local failure criterion for API X65 steel is applied to predict ductile failure of full-scale API X65 pipes with simulated corrosion and gouge defects under internal pressure. The local failure criterion is the stress-modified fracture strain as a function of the stress triaxiality (defined by the ratio of the hydrostatic stress to the effective stress). Based on detailed finite element (FE) analyses with the proposed local failure criterion, burst pressures of defective pipes are estimated and compared with experimental data. For pipes with simulated corrosion defects, FE analysis with the proposed local fracture criterion indicates that predicted failure takes place after the defective pipes attain maximum loads for all cases, possibly due to the fact that the material has sufficient ductility. For pipes with simulated gouge defects, on the other hand, it is found that predicted failure takes place before global instability, and the predicted burst pressures are in good agreement with experimental data, providing confidence in the present approach.

Original language	English
Pages (from-to)	512-525
Number of pages	14
Journal	International Journal of Pressure Vessels and Piping
Volume	84
Issue number	8
DOIs	https://doi.org/10.1016/j.ijpvp.2007.03.002
Publication status	Published - 2007 Aug

Bibliographical note

Funding Information:
This research is performed under the program of Basic Atomic Energy Research Institute (BAERI), is a part of the Nuclear R&D Programs funded by the Ministry of Science & Technology (MOST) of Korea, and under the program of the Brain Korea 21 Project in 2006.

Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.

Keywords

API X65 steel
Ductile fracture
Finite element (FE) analysis
Gouge
Local fracture strain criterion

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1016/j.ijpvp.2007.03.002

Cite this

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title = "Ductile failure analysis of API X65 pipes with notch-type defects using a local fracture criterion",

abstract = "A local failure criterion for API X65 steel is applied to predict ductile failure of full-scale API X65 pipes with simulated corrosion and gouge defects under internal pressure. The local failure criterion is the stress-modified fracture strain as a function of the stress triaxiality (defined by the ratio of the hydrostatic stress to the effective stress). Based on detailed finite element (FE) analyses with the proposed local failure criterion, burst pressures of defective pipes are estimated and compared with experimental data. For pipes with simulated corrosion defects, FE analysis with the proposed local fracture criterion indicates that predicted failure takes place after the defective pipes attain maximum loads for all cases, possibly due to the fact that the material has sufficient ductility. For pipes with simulated gouge defects, on the other hand, it is found that predicted failure takes place before global instability, and the predicted burst pressures are in good agreement with experimental data, providing confidence in the present approach.",

keywords = "API X65 steel, Ductile fracture, Finite element (FE) analysis, Gouge, Local fracture strain criterion",

author = "Oh, {Chang Kyun} and Kim, {Yun Jae} and Baek, {Jong Hyun} and Kim, {Young Pyo} and Kim, {Woo Sik}",

note = "Funding Information: This research is performed under the program of Basic Atomic Energy Research Institute (BAERI), is a part of the Nuclear R&D Programs funded by the Ministry of Science & Technology (MOST) of Korea, and under the program of the Brain Korea 21 Project in 2006. Copyright: Copyright 2009 Elsevier B.V., All rights reserved.",

year = "2007",

month = aug,

doi = "10.1016/j.ijpvp.2007.03.002",

language = "English",

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AU - Oh, Chang Kyun

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AU - Kim, Young Pyo

AU - Kim, Woo Sik

N1 - Funding Information: This research is performed under the program of Basic Atomic Energy Research Institute (BAERI), is a part of the Nuclear R&D Programs funded by the Ministry of Science & Technology (MOST) of Korea, and under the program of the Brain Korea 21 Project in 2006. Copyright: Copyright 2009 Elsevier B.V., All rights reserved.

PY - 2007/8

Y1 - 2007/8

N2 - A local failure criterion for API X65 steel is applied to predict ductile failure of full-scale API X65 pipes with simulated corrosion and gouge defects under internal pressure. The local failure criterion is the stress-modified fracture strain as a function of the stress triaxiality (defined by the ratio of the hydrostatic stress to the effective stress). Based on detailed finite element (FE) analyses with the proposed local failure criterion, burst pressures of defective pipes are estimated and compared with experimental data. For pipes with simulated corrosion defects, FE analysis with the proposed local fracture criterion indicates that predicted failure takes place after the defective pipes attain maximum loads for all cases, possibly due to the fact that the material has sufficient ductility. For pipes with simulated gouge defects, on the other hand, it is found that predicted failure takes place before global instability, and the predicted burst pressures are in good agreement with experimental data, providing confidence in the present approach.

AB - A local failure criterion for API X65 steel is applied to predict ductile failure of full-scale API X65 pipes with simulated corrosion and gouge defects under internal pressure. The local failure criterion is the stress-modified fracture strain as a function of the stress triaxiality (defined by the ratio of the hydrostatic stress to the effective stress). Based on detailed finite element (FE) analyses with the proposed local failure criterion, burst pressures of defective pipes are estimated and compared with experimental data. For pipes with simulated corrosion defects, FE analysis with the proposed local fracture criterion indicates that predicted failure takes place after the defective pipes attain maximum loads for all cases, possibly due to the fact that the material has sufficient ductility. For pipes with simulated gouge defects, on the other hand, it is found that predicted failure takes place before global instability, and the predicted burst pressures are in good agreement with experimental data, providing confidence in the present approach.

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Ductile failure analysis of API X65 pipes with notch-type defects using a local fracture criterion

Abstract

Bibliographical note

Keywords

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