Finite element analysis to assess the effect of initial plasticity on transient creep for defects under mechanical loading

Y. J. Kim; D. W. Dean; P. J. Budden

doi:10.1016/S0308-0161(01)00119-3

Finite element analysis to assess the effect of initial plasticity on transient creep for defects under mechanical loading

Y. J. Kim, D. W. Dean, P. J. Budden

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

27 Citations (Scopus)

Abstract

Finite element (FE) transient creep analyses have been performed for geometries of differing constraint levels, namely compact and centre-cracked tension specimens and circumferentially-cracked cylinders. Elastic-creep and elastic-plastic-creep behaviour with the same stress exponents in power-law creep and plasticity were considered. The complete time history between initial transient creep response and steady state conditions has been analysed for a range of load levels. Estimates of J(t) and C(t) have been compared with computed values. The known asymptotic behaviour in the limits as time, t → 0 and t → ∞ has been confirmed. At intermediate times, estimation formulae are suggested which compare well with the FE results. The suggested expressions modify existing formulae in the literature and provide improved agreement with the FE results.

Original language	English
Pages (from-to)	1021-1029
Number of pages	9
Journal	International Journal of Pressure Vessels and Piping
Volume	78
Issue number	11-12
DOIs	https://doi.org/10.1016/S0308-0161(01)00119-3
Publication status	Published - 2001 Jan 1
Externally published	Yes

Keywords

Creep
Defects
Plasticity

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/S0308-0161(01)00119-3

Cite this

@article{3d9f98a0880f4efb80bd1e05e42b7195,

title = "Finite element analysis to assess the effect of initial plasticity on transient creep for defects under mechanical loading",

abstract = "Finite element (FE) transient creep analyses have been performed for geometries of differing constraint levels, namely compact and centre-cracked tension specimens and circumferentially-cracked cylinders. Elastic-creep and elastic-plastic-creep behaviour with the same stress exponents in power-law creep and plasticity were considered. The complete time history between initial transient creep response and steady state conditions has been analysed for a range of load levels. Estimates of J(t) and C(t) have been compared with computed values. The known asymptotic behaviour in the limits as time, t → 0 and t → ∞ has been confirmed. At intermediate times, estimation formulae are suggested which compare well with the FE results. The suggested expressions modify existing formulae in the literature and provide improved agreement with the FE results.",

keywords = "Creep, Defects, Plasticity",

author = "Kim, {Y. J.} and Dean, {D. W.} and Budden, {P. J.}",

year = "2001",

month = jan,

day = "1",

doi = "10.1016/S0308-0161(01)00119-3",

language = "English",

volume = "78",

pages = "1021--1029",

journal = "International Journal of Pressure Vessels and Piping",

issn = "0308-0161",

publisher = "Elsevier BV",

number = "11-12",

}

TY - JOUR

T1 - Finite element analysis to assess the effect of initial plasticity on transient creep for defects under mechanical loading

AU - Kim, Y. J.

AU - Dean, D. W.

AU - Budden, P. J.

PY - 2001/1/1

Y1 - 2001/1/1

N2 - Finite element (FE) transient creep analyses have been performed for geometries of differing constraint levels, namely compact and centre-cracked tension specimens and circumferentially-cracked cylinders. Elastic-creep and elastic-plastic-creep behaviour with the same stress exponents in power-law creep and plasticity were considered. The complete time history between initial transient creep response and steady state conditions has been analysed for a range of load levels. Estimates of J(t) and C(t) have been compared with computed values. The known asymptotic behaviour in the limits as time, t → 0 and t → ∞ has been confirmed. At intermediate times, estimation formulae are suggested which compare well with the FE results. The suggested expressions modify existing formulae in the literature and provide improved agreement with the FE results.

AB - Finite element (FE) transient creep analyses have been performed for geometries of differing constraint levels, namely compact and centre-cracked tension specimens and circumferentially-cracked cylinders. Elastic-creep and elastic-plastic-creep behaviour with the same stress exponents in power-law creep and plasticity were considered. The complete time history between initial transient creep response and steady state conditions has been analysed for a range of load levels. Estimates of J(t) and C(t) have been compared with computed values. The known asymptotic behaviour in the limits as time, t → 0 and t → ∞ has been confirmed. At intermediate times, estimation formulae are suggested which compare well with the FE results. The suggested expressions modify existing formulae in the literature and provide improved agreement with the FE results.

KW - Creep

KW - Defects

KW - Plasticity

UR - http://www.scopus.com/inward/record.url?scp=0000283041&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000283041&partnerID=8YFLogxK

U2 - 10.1016/S0308-0161(01)00119-3

DO - 10.1016/S0308-0161(01)00119-3

M3 - Article

AN - SCOPUS:0000283041

SN - 0308-0161

VL - 78

SP - 1021

EP - 1029

JO - International Journal of Pressure Vessels and Piping

JF - International Journal of Pressure Vessels and Piping

IS - 11-12

ER -

Finite element analysis to assess the effect of initial plasticity on transient creep for defects under mechanical loading

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this