Effect of Lüders strain on engineering crack opening displacement estimations for leak-before-break analysis: Finite element study

Yun Jae Kim, N. S. Huh, Y. J. Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

As a companion paper to our previous paper [Fatigue Fract. Engng Mater. Struct. 24, 243-254], this note provides further validation on the engineering crack opening displacement (COD) estimation equation based on the enhanced reference stress method against three-dimensional, elastic-plastic finite element (FE) results using actual tensile data of three typical ferritic steels exhibiting a wide range of Lüders strain. Furthermore, the resulting FE results are also compared with the GE/EPRI COD predictions. It is found that the proposed enhanced reference stress method gives overall more accurate and robust COD results than the GE/EPRI method, compared with the FE results.

Original languageEnglish
Pages (from-to)617-623
Number of pages7
JournalFatigue and Fracture of Engineering Materials and Structures
Volume24
Issue number9
DOIs
Publication statusPublished - 2001 Sep 1
Externally publishedYes

Fingerprint

Cracks
Finite element method
Ferritic steel
Fatigue of materials
Plastics

Keywords

  • Crack opening displacement
  • Enhanced reference stress method
  • Leak-before-break
  • Lüders strain

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "As a companion paper to our previous paper [Fatigue Fract. Engng Mater. Struct. 24, 243-254], this note provides further validation on the engineering crack opening displacement (COD) estimation equation based on the enhanced reference stress method against three-dimensional, elastic-plastic finite element (FE) results using actual tensile data of three typical ferritic steels exhibiting a wide range of L{\"u}ders strain. Furthermore, the resulting FE results are also compared with the GE/EPRI COD predictions. It is found that the proposed enhanced reference stress method gives overall more accurate and robust COD results than the GE/EPRI method, compared with the FE results.",
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AB - As a companion paper to our previous paper [Fatigue Fract. Engng Mater. Struct. 24, 243-254], this note provides further validation on the engineering crack opening displacement (COD) estimation equation based on the enhanced reference stress method against three-dimensional, elastic-plastic finite element (FE) results using actual tensile data of three typical ferritic steels exhibiting a wide range of Lüders strain. Furthermore, the resulting FE results are also compared with the GE/EPRI COD predictions. It is found that the proposed enhanced reference stress method gives overall more accurate and robust COD results than the GE/EPRI method, compared with the FE results.

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