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

    28 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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