Quantification of the yield strength-to-elastic modulus ratio effect on TES plastic loads from finite element limit analyses of elbows

Kuk Hee Lee, Chang Sik Oh, Yun Jae Kim, Kee Bong Yoon

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

This paper quantifies the effect of the yield strength-to-elastic modulus ratio on twice-elastic-slope plastic loads for 90-degree elbows under in-plane and out-of-plane bending. Based on extensive and systematic finite element limit analyses using elastic-perfectly plastic materials, simple regression equations between the yield strength-to-elastic modulus ratio and twice-elastic-slope plastic loads for elbows under in-plane closing, in-plane opening and out-of-plane bending are proposed, and validated against published experimental data. Applicability of the proposed equations to circumferential cracked elbows under in-plane bending is also investigated.

Original languageEnglish
Pages (from-to)856-875
Number of pages20
JournalEngineering Fracture Mechanics
Volume76
Issue number7
DOIs
Publication statusPublished - 2009 May

Bibliographical note

Funding Information:
This research is performed under programs of Basic Atomic Energy Research Institute and Engineering Research Center (No. R11-2007-028-00000-0), funded by Korea Science & Engineering Foundation.

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

Keywords

  • Elbow
  • Finite element limit analysis
  • Large geometry change
  • Plastic load
  • Twice-elastic-slope

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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