Evaluation of stress intensity factors due to welding residual stresses for circumferential cracked pipes

Chang Young Oh, Yun-Jae Kim, Young Jin Oh, Jong Sung Kim, Tae Kwang Song, Yong Beum Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

To investigate the applicability of existing methods to estimate stress intensity factors due to welding residual stresses, comparisons with finite element (FE) solutions are made for two types of generic welding residual stress profiles, generated by simulating repair welds. It is found that fitting residual stresses over the crack depth using third-order polynomials gives good estimates of stress intensity factors but fitting over the entire thickness can result in inaccurate estimates even with fourth-order polynomials. Noting that welding residual stresses are often determined from FE analyses, linearization of residual stresses to estimate stress intensity factors is proposed. Comparison with FE solutions shows good agreements.

Original languageEnglish
Pages (from-to)36-48
Number of pages13
JournalInternational Journal of Pressure Vessels and Piping
Volume105-106
DOIs
Publication statusPublished - 2013 May 1

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Keywords

  • Circumferential surface cracks
  • Finite element analysis
  • Stress intensity factors
  • Welding residual stress

ASJC Scopus subject areas

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

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