Fatigue and corrosion fatigue life assessment with application to autofrettaged parts

Volodymyr Okorokov, Donald MacKenzie, Yevgen Gorash

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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Abstract

This study investigates an effect of autofrettage on the fatigue and corrosion fatigue life of high pressure parts made from low carbon structural steel. To estimate the beneficial effect of autofrettage application, an extensive experimental program and advanced theoretical modelling are conducted and analyzed in this study. Accurate calculation of compressive residual stresses is achieved by application of a cyclic plasticity model which can precisely simulate a cyclic plasticity response of material. In terms of a fatigue life prediction methodology, a non-local stress based approach with a modified critical distance theory is used for prediction of the crack initiation stage providing conservative fatigue assessment. Because of the fact that the crack propagation stage can take a considerable part of the total life for autofrettaged parts, more accurate fatigue life calculation is performed by the use of a fracture mechanics approach. The total fatigue life time of autofrettaged parts is then calculated as a sum of the crack initiation and propagation stages.
Original languageEnglish
Title of host publicationASME 2018 Pressure Vessels and Piping Conference
Subtitle of host publicationVolume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD)
Place of PublicationNew York
Number of pages6
DOIs
Publication statusPublished - 20 Jul 2018
EventASME 2018 Pressure Vessels and Piping Conference - Prague, Czech Republic
Duration: 15 Jul 201820 Jul 2018

Conference

ConferenceASME 2018 Pressure Vessels and Piping Conference
Abbreviated titlePVP 2018
Country/TerritoryCzech Republic
CityPrague
Period15/07/1820/07/18

Keywords

  • autofrettage
  • fatigue
  • corrosion fatigue life
  • high pressure parts

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