Elastic-plastic fracture mechanics analyses for circumferential part-through surface cracks at the interface between elbows and pipes

Tae Kwang Song, Chang Kyun Oh, Yun Jae Kim, Jong Sung Kim, Tae Eun Jin

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This paper presents plastic limit loads and approximate J-integral estimates for circumferential part-through surface crack at the interface between elbows and pipes. Based on finite element limit analyses using elastic-perfectly plastic materials, plastic limit moments under in-plane bending are obtained and it is found that they are similar those for circumferential part-through surface cracks in the center of elbow. Based on present FE results, closed-form limit load solutions are proposed. Welds are not explicitly considered and all materials are assumed to be homogeneous. And the method to estimate the elastic-plastic J-integral for circumferential part-through surface cracks at the interface between elbows and straight pipes is proposed based on the reference stress approach, which was compared with corresponding solutions for straight pipes.

Original languageEnglish
Pages (from-to)710-717
Number of pages8
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume31
Issue number6
DOIs
Publication statusPublished - 2007 Jun
Externally publishedYes

Keywords

  • Finite Element Analysis
  • J-Integral
  • Pipe Bend
  • Plastic Limit Load
  • Reference Stress

ASJC Scopus subject areas

  • Mechanical Engineering

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