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

H. S. Lee, J. H. Je, Yun-Jae Kim, R. A. Ainsworth, P. J. Budden

Research output: Contribution to journalArticle

1 Citation (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 languageEnglish
JournalFatigue and Fracture of Engineering Materials and Structures
DOIs
Publication statusAccepted/In press - 2016

Fingerprint

Fracture mechanics
Creep
Plastics
Plasticity
Crack tips

Keywords

  • Crack-tip stress fields
  • Elastic-plastic-creep
  • Plasticity correction term
  • Time-dependent C(t) and J(t) estimation equations

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

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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.",
keywords = "Crack-tip stress fields, Elastic-plastic-creep, Plasticity correction term, Time-dependent C(t) and J(t) estimation equations",
author = "Lee, {H. S.} and Je, {J. H.} and Yun-Jae Kim and Ainsworth, {R. A.} and Budden, {P. J.}",
year = "2016",
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language = "English",
journal = "Fatigue and Fracture of Engineering Materials and Structures",
issn = "8756-758X",
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TY - JOUR

T1 - General time-dependent C(t) and J(t) estimation equations for elastic-plastic-creep fracture mechanics analysis

AU - Lee, H. S.

AU - Je, J. H.

AU - Kim, Yun-Jae

AU - Ainsworth, R. A.

AU - Budden, P. J.

PY - 2016

Y1 - 2016

N2 - 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.

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.

KW - Crack-tip stress fields

KW - Elastic-plastic-creep

KW - Plasticity correction term

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

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