Implementation of plasticity model for a steel with mixed cyclic softening and hardening and its application to fatigue assessments

Volodymyr Okorokov, Tugrul Comlekci, Donald MacKenzie, Ralph van Rijswick, Yevgen Gorash

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Abstract

This paper presents a numerical modelling and experimental investigation of the cyclic plasticity behaviour of low carbon steel. In order to improve the accuracy of modelling the material response under cycling loading, a new set of internal variables is proposed. The developed plasticity model is applied to the problem of modelling compressive residual stress inducing methods which are based on a plastic overload of a material. A beneficial influence of induced compressive residual stress is demonstrated on a benchmark problem of autofrettage of a high pressure thick-walled cylinder. Numerical simulation of the cyclic plasticity problems and fatigue assessments are carried out by means of FEM in ANSYS Workbench with FORTRAN user-programmable subroutines for material model incorporating custom equations.
Original languageEnglish
Title of host publicationFatigue 2017 Proceedings of the 7th Engineering Integrity Society International Conference on Durability & Fatigue
Subtitle of host publicationDowning College, Cambridge, UK, 3-5 July 2017
EditorsP. Bailey, F. Berto, E.R. Cawte, P. Roberts, M.T. Whittaker, J.R. Yates
Place of PublicationRutland, UK
Pages72-81
Number of pages10
Publication statusPublished - 30 Jun 2017
EventEIS Fatigue 2017: 7th Engineering Integrity Society International Conference on Durability & Fatigue - Downing College, Cambridge, United Kingdom
Duration: 3 Jul 20175 Jul 2017
http://www.fatigue2017.com/

Conference

ConferenceEIS Fatigue 2017
Abbreviated titleEIS Fatigue 2017
CountryUnited Kingdom
CityCambridge
Period3/07/175/07/17
Internet address

Keywords

  • autofrettage
  • compressive residual stress
  • plasticity
  • steel
  • cyclic softening
  • fatigue

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    Research Output

    New formulation of nonlinear kinematic hardening model, part I: a Dirac delta function approach

    Okorokov, V., Gorash, Y., MacKenzie, D. & van Rijswick, R., 30 Nov 2019, In : International Journal of Plasticity. 122, p. 89-114 26 p.

    Research output: Contribution to journalArticle

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  • 1 Citation (Scopus)
    5 Downloads (Pure)

    New formulation of nonlinear kinematic hardening model, part II: cyclic hardening/softening and ratcheting

    Okorokov, V., Gorash, Y., MacKenzie, D. & van Rijswick, R., 30 Nov 2019, In : International Journal of Plasticity. 122, p. 244-257 14 p.

    Research output: Contribution to journalArticle

    Open Access
    File
  • 1 Citation (Scopus)
    3 Downloads (Pure)

    Cite this

    Okorokov, V., Comlekci, T., MacKenzie, D., van Rijswick, R., & Gorash, Y. (2017). Implementation of plasticity model for a steel with mixed cyclic softening and hardening and its application to fatigue assessments. In P. Bailey, F. Berto, E. R. Cawte, P. Roberts, M. T. Whittaker, & J. R. Yates (Eds.), Fatigue 2017 Proceedings of the 7th Engineering Integrity Society International Conference on Durability & Fatigue: Downing College, Cambridge, UK, 3-5 July 2017 (pp. 72-81).