Transient elastic-plastic-creep crack-tip stress fields under load-controlled loading

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

doi:10.1111/ffe.12740

Transient elastic-plastic-creep crack-tip stress fields under load-controlled loading

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

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

4 Citations (Scopus)

Abstract

This paper presents transient and steady-state elastic-plastic-creep crack-tip stress fields under load-controlled loading conditions for a wide range of combinations of power-law plastic and creep materials. The crack-tip stress fields are characterized in terms of 2 parameters to accommodate the crack-tip constraint effect; the C(t)- (or C*-) integral and the β_Q parameter (the Q-parameter normalized with respect to the proximity parameter to plastic collapse). For practical application, the crack-tip stress fields are re-formulated explicitly in terms of time and crack-tip stress fields for elastic-plastic and steady-state creep conditions. Comparison with detailed FE results for plane strain tension and bend specimens shows that this formulation of the crack-tip stress fields agrees well with finite element results.

Original language	English
Pages (from-to)	949-965
Number of pages	17
Journal	Fatigue and Fracture of Engineering Materials and Structures
Volume	41
Issue number	4
DOIs	https://doi.org/10.1111/ffe.12740
Publication status	Published - 2018 Apr

Bibliographical note

Publisher Copyright:
© 2017 Wiley Publishing Ltd.

Keywords

crack-tip constraint
crack-tip stress fields
elastic-plastic-creep condition
transient creep conditions

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1111/ffe.12740

Cite this

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title = "Transient elastic-plastic-creep crack-tip stress fields under load-controlled loading",

abstract = "This paper presents transient and steady-state elastic-plastic-creep crack-tip stress fields under load-controlled loading conditions for a wide range of combinations of power-law plastic and creep materials. The crack-tip stress fields are characterized in terms of 2 parameters to accommodate the crack-tip constraint effect; the C(t)- (or C*-) integral and the βQ parameter (the Q-parameter normalized with respect to the proximity parameter to plastic collapse). For practical application, the crack-tip stress fields are re-formulated explicitly in terms of time and crack-tip stress fields for elastic-plastic and steady-state creep conditions. Comparison with detailed FE results for plane strain tension and bend specimens shows that this formulation of the crack-tip stress fields agrees well with finite element results.",

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author = "Lee, {H. S.} and Kim, {D. J.} and Kim, {Y. J.} and Ainsworth, {R. A.} and Budden, {P. J.}",

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AU - Ainsworth, R. A.

AU - Budden, P. J.

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AB - This paper presents transient and steady-state elastic-plastic-creep crack-tip stress fields under load-controlled loading conditions for a wide range of combinations of power-law plastic and creep materials. The crack-tip stress fields are characterized in terms of 2 parameters to accommodate the crack-tip constraint effect; the C(t)- (or C*-) integral and the βQ parameter (the Q-parameter normalized with respect to the proximity parameter to plastic collapse). For practical application, the crack-tip stress fields are re-formulated explicitly in terms of time and crack-tip stress fields for elastic-plastic and steady-state creep conditions. Comparison with detailed FE results for plane strain tension and bend specimens shows that this formulation of the crack-tip stress fields agrees well with finite element results.

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Transient elastic-plastic-creep crack-tip stress fields under load-controlled loading

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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