General time-dependent C(t) and J(t) estimation equations for elastic-plastic-creep fracture mechanics analysis

H. S. Lee; J. H. Je; Y. J. Kim; R. A. Ainsworth; P. J. Budden

doi:10.1111/ffe.12418

General time-dependent C(t) and J(t) estimation equations for elastic-plastic-creep fracture mechanics analysis

H. S. Lee, J. H. Je, Y. J. Kim, R. A. Ainsworth, P. J. Budden

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

This paper presents equations for estimating the crack tip characterizing parameters C(t) and J(t), for general elastic-plastic-creep conditions where the power-law creep and plasticity stress exponents differ, by modifying the plasticity correction term in published equations. The plasticity correction term in the newly proposed equations is given in terms of the initial elastic-plastic and steady-state creep stress fields. The predicted C(t) and J(t) results are validated by comparison with systematic elastic-plastic-creep FE results. Good agreement with the FE results is found.

Original language	English
Pages (from-to)	1092-1104
Number of pages	13
Journal	Fatigue and Fracture of Engineering Materials and Structures
Volume	39
Issue number	9
DOIs	https://doi.org/10.1111/ffe.12418
Publication status	Published - 2016 Sep 1

Keywords

crack-tip stress fields
elastic-plastic-creep
plasticity correction term
time-dependent C(t) and J(t) estimation equations

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1111/ffe.12418

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title = "General time-dependent C(t) and J(t) estimation equations for elastic-plastic-creep fracture mechanics analysis",

abstract = "This paper presents equations for estimating the crack tip characterizing parameters C(t) and J(t), for general elastic-plastic-creep conditions where the power-law creep and plasticity stress exponents differ, by modifying the plasticity correction term in published equations. The plasticity correction term in the newly proposed equations is given in terms of the initial elastic-plastic and steady-state creep stress fields. The predicted C(t) and J(t) results are validated by comparison with systematic elastic-plastic-creep FE results. Good agreement with the FE results is found.",

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AU - Je, J. H.

AU - Kim, Y. J.

AU - Ainsworth, R. A.

AU - Budden, P. J.

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AB - This paper presents equations for estimating the crack tip characterizing parameters C(t) and J(t), for general elastic-plastic-creep conditions where the power-law creep and plasticity stress exponents differ, by modifying the plasticity correction term in published equations. The plasticity correction term in the newly proposed equations is given in terms of the initial elastic-plastic and steady-state creep stress fields. The predicted C(t) and J(t) results are validated by comparison with systematic elastic-plastic-creep FE results. Good agreement with the FE results is found.

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KW - plasticity correction term

KW - time-dependent C(t) and J(t) estimation equations

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