A comparative study between conventional and elevated temperature creep autofrettage

Volodymyr Okorokov, Yevgen Gorash

Research output: Contribution to journalConference Contribution

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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.
Original languageEnglish
Pages (from-to)202-209
Number of pages8
JournalProcedia Structural Integrity
Volume5
DOIs
Publication statusPublished - 6 Sep 2017

Keywords

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

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