Creep elastic follow-up factors under combined primary and secondary stresses

Kuk Hee Lee, Yun Jae Kim, Dong Wook Jerng, Robert A. Ainsworth, Dave Dean

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This paper presents elastic-creep finite element analyses for smooth and notched plane strain beams and axi-symmetric pipes subject to combined primary and secondary stresses. The relative magnitudes of the primary and secondary stresses are systematically varied. Elastic follow-up factors, which quantify the effect of the primary stress on creep relaxation behaviour of the secondary stress, are extracted as a function of the relative magnitude of the primary and secondary stresses. It is found that elastic follow-up factors due to the secondary stress are affected by the magnitude of the primary stress, and the presence of the primary stress can significantly increase elastic follow-up factors. © 2012 Elsevier Ltd.
    Original languageEnglish
    Pages (from-to)12-22
    Number of pages10
    JournalInternational Journal of Pressure Vessels and Piping
    Volume101
    DOIs
    Publication statusPublished - Jan 2013

    Keywords

    • Beam
    • Combined primary and secondary load
    • Creep elastic follow-up factor
    • Pipe

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