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

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

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 c...

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Veröffentlicht in:Fatigue & fracture of engineering materials & structures 2018-04, Vol.41 (4), p.949-965
Hauptverfasser: Lee, H.‐S., Kim, D.‐J., Kim, Y.‐J., Ainsworth, R.A., Budden, P.J.
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Sprache:eng
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crack‐tip constraint
crack‐tip stress fields
Creep (materials)
elastic‐plastic‐creep condition
Finite element method
Islands
Parameters
Plane strain
Plastic collapse
Reservoirs
Stresses
transient creep conditions
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container_end_page 965
container_issue 4
container_start_page 949
container_title Fatigue & fracture of engineering materials & structures
container_volume 41
creator Lee, H.‐S.
Kim, D.‐J.
Kim, Y.‐J.
Ainsworth, R.A.
Budden, P.J.
description 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.
doi_str_mv 10.1111/ffe.12740
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subjects crack‐tip constraint
crack‐tip stress fields
Creep (materials)
elastic‐plastic‐creep condition
Finite element method
Islands
Parameters
Plane strain
Plastic collapse
Reservoirs
Stresses
transient creep conditions
title Transient elastic‐plastic‐creep crack‐tip stress fields under load‐controlled loading
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