Elastic follow-up factors to estimate C(t) under secondary loading

Kuk Hee Lee, Yun Jae Kim, Robert A. Ainsworth, David Dean

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposes a method to determine the elastic follow-up factors for C(t)-integral under secondary stress. The rate of creep crack growth for transient creep is correlated with C(t)-integral. The elastic follow-up behaviour, which occurs in structures under secondary loading, prevents a relaxation of stress during transient creep. Thus, both the value of C(t) and creep crack growth increase with an increasing elastic follow-up. An estimation solution for C(t) has been proposed by Ainsworth and Dean based on the reference stress method. In order to predict the value of C(t) using this solution, an independent method to determine the elastic follow-up factors for cracked bodies is required. This paper proposes that the elastic follow-up factors for C(t) can be determined by elastic-plastic analyses by using the plastic-creep analogy. Finite element analyses have been performed to verify this method.

Original languageEnglish
Title of host publicationASME 2012 Pressure Vessels and Piping Conference, PVP 2012
Pages241-247
Number of pages7
DOIs
Publication statusPublished - 2012
EventASME 2012 Pressure Vessels and Piping Conference, PVP 2012 - Toronto, ON, Canada
Duration: 2012 Jul 152012 Jul 19

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume1
ISSN (Print)0277-027X

Other

OtherASME 2012 Pressure Vessels and Piping Conference, PVP 2012
CountryCanada
CityToronto, ON
Period12/7/1512/7/19

ASJC Scopus subject areas

  • Mechanical Engineering

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  • Cite this

    Lee, K. H., Kim, Y. J., Ainsworth, R. A., & Dean, D. (2012). Elastic follow-up factors to estimate C(t) under secondary loading. In ASME 2012 Pressure Vessels and Piping Conference, PVP 2012 (pp. 241-247). (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 1). https://doi.org/10.1115/PVP2012-78454