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

School of Mechanical Engineering

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

2 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

Keywords

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

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1111/ffe.12740

Cite this

@article{035be54dcfd5410bb90efb5ed9fb08e6,

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.",

keywords = "crack-tip constraint, crack-tip stress fields, elastic-plastic-creep condition, transient creep conditions",

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

note = "Funding Information: This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning (NRF‐2013M2B2B1075733, NRF‐2013M2A7A1076396). Publisher Copyright: {\textcopyright} 2017 Wiley Publishing Ltd.",

year = "2018",

month = apr,

doi = "10.1111/ffe.12740",

language = "English",

volume = "41",

pages = "949--965",

journal = "Fatigue and Fracture of Engineering Materials and Structures",

issn = "8756-758X",

publisher = "Wiley-Blackwell",

number = "4",

}

TY - JOUR

T1 - Transient elastic-plastic-creep crack-tip stress fields under load-controlled loading

AU - Lee, H. S.

AU - Kim, D. J.

AU - Kim, Y. J.

AU - Ainsworth, R. A.

AU - Budden, P. J.

N1 - Funding Information: This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning (NRF‐2013M2B2B1075733, NRF‐2013M2A7A1076396). Publisher Copyright: © 2017 Wiley Publishing Ltd.

PY - 2018/4

Y1 - 2018/4

N2 - 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.

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.

KW - crack-tip constraint

KW - crack-tip stress fields

KW - elastic-plastic-creep condition

KW - transient creep conditions

UR - http://www.scopus.com/inward/record.url?scp=85043358172&partnerID=8YFLogxK

U2 - 10.1111/ffe.12740

DO - 10.1111/ffe.12740

M3 - Article

AN - SCOPUS:85043358172

SN - 8756-758X

VL - 41

SP - 949

EP - 965

JO - Fatigue and Fracture of Engineering Materials and Structures

JF - Fatigue and Fracture of Engineering Materials and Structures

IS - 4

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this