A comparative study between conventional and elevated temperature creep autofrettage

Research output: Contribution to journalConference Contribution

Abstract

This paper presents a comparative study between conventional hydraulic and elevated temperature autofrettage. For modelling of both methods advanced plasticity and creep material models are used. The main governing equations for the models are presented as well. A beneficial influence of compressive residual stresses induced by both methods is demonstrated on a benchmark problem of cross bored block. The effectiveness and applicability of the two methods are estimated by conduction of compressive residual stress analysis and crack arrest modeling. Numerical simulation of the cyclic plasticity and creep problems are carried out by means of FEM in ANSYS Workbench with FORTRAN user-programmable subroutines for material model incorporating custom equations.
LanguageEnglish
Pages202-209
Number of pages8
JournalProcedia Structural Integrity
Volume5
DOIs
Publication statusPublished - 6 Sep 2017

Fingerprint

Creep
Compressive stress
Plasticity
Residual stresses
Subroutines
Stress analysis
Temperature
Hydraulics
Cracks
Finite element method
Computer simulation

Keywords

  • crack arrest
  • creep autofrettage
  • finite analysis
  • plasticity
  • compressive residual stress

Cite this

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title = "A comparative study between conventional and elevated temperature creep autofrettage",
abstract = "This paper presents a comparative study between conventional hydraulic and elevated temperature autofrettage. For modelling of both methods advanced plasticity and creep material models are used. The main governing equations for the models are presented as well. A beneficial influence of compressive residual stresses induced by both methods is demonstrated on a benchmark problem of cross bored block. The effectiveness and applicability of the two methods are estimated by conduction of compressive residual stress analysis and crack arrest modeling. Numerical simulation of the cyclic plasticity and creep problems are carried out by means of FEM in ANSYS Workbench with FORTRAN user-programmable subroutines for material model incorporating custom equations.",
keywords = "crack arrest, creep autofrettage, finite analysis, plasticity, compressive residual stress",
author = "Volodymyr Okorokov and Yevgen Gorash",
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}

A comparative study between conventional and elevated temperature creep autofrettage. / Okorokov, Volodymyr; Gorash, Yevgen.

In: Procedia Structural Integrity, Vol. 5, 06.09.2017, p. 202-209.

Research output: Contribution to journalConference Contribution

TY - JOUR

T1 - A comparative study between conventional and elevated temperature creep autofrettage

AU - Okorokov, Volodymyr

AU - Gorash, Yevgen

PY - 2017/9/6

Y1 - 2017/9/6

N2 - This paper presents a comparative study between conventional hydraulic and elevated temperature autofrettage. For modelling of both methods advanced plasticity and creep material models are used. The main governing equations for the models are presented as well. A beneficial influence of compressive residual stresses induced by both methods is demonstrated on a benchmark problem of cross bored block. The effectiveness and applicability of the two methods are estimated by conduction of compressive residual stress analysis and crack arrest modeling. Numerical simulation of the cyclic plasticity and creep problems are carried out by means of FEM in ANSYS Workbench with FORTRAN user-programmable subroutines for material model incorporating custom equations.

AB - This paper presents a comparative study between conventional hydraulic and elevated temperature autofrettage. For modelling of both methods advanced plasticity and creep material models are used. The main governing equations for the models are presented as well. A beneficial influence of compressive residual stresses induced by both methods is demonstrated on a benchmark problem of cross bored block. The effectiveness and applicability of the two methods are estimated by conduction of compressive residual stress analysis and crack arrest modeling. Numerical simulation of the cyclic plasticity and creep problems are carried out by means of FEM in ANSYS Workbench with FORTRAN user-programmable subroutines for material model incorporating custom equations.

KW - crack arrest

KW - creep autofrettage

KW - finite analysis

KW - plasticity

KW - compressive residual stress

U2 - 10.1016/j.prostr.2017.07.110

DO - 10.1016/j.prostr.2017.07.110

M3 - Conference Contribution

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SP - 202

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JO - Procedia Structural Integrity

T2 - Procedia Structural Integrity

JF - Procedia Structural Integrity

SN - 2452-3216

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