Effect of biaxiality on engineering critical assessments

Konstantinos Kouzoumis, Isabel Hadley, Mahmoud Mostafavi

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

1 Citation (Scopus)

Abstract

Common practice for the integrity assessment of structures, follows the use of Fitness for Service procedures, such as BS 7910/R6. There are many common structures (e.g. pipes) that are under biaxial loading. Even though the load biaxiality has been proven experimentally to have an effect on both the fracture toughness and the limit load of a component, the influence of biaxial stresses is not always directly addressed in the procedures. In order to address the effect of biaxiality on engineering critical assessments, BS 7910 and R6 fitness for service procedures are applied to four biaxially loaded wide plate tests previously conducted on A533B steel. The plates had been loaded in biaxial tension, with different biaxiality ratios, while the temperatures of the plates tested correspond to lower transition fracture toughness. The assessments include failure assessment lines created using Option 1, which requires the knowledge of the yield stress and tensile strength, Option 3 which is a material, structure and load dependent option, as well as a constraint modified Option 3 failure assessment line. To obtain Option 3 failure assessment lines, finite element analyses are conducted for the specimens. The tests are first assessed with the proximity to plastic collapse (Lr) and fracture (Kr) being calculated with the use of the main fracture clauses of BS 7910/R6, which do not take into account the effects of biaxiality. The conventional assessment is then followed by a more detailed assessment using the values calculated from Finite Element Analyses (FEA).

Original languageEnglish
Title of host publication3rd International Conference on Structural Integrity, ICSI 2019, 2-5 September 2019, Funchal, Madeira, Portugal
PublisherElsevier
Pages347-354
Number of pages8
Volume17
DOIs
Publication statusPublished - 2019
Externally publishedYes
EventInternational Conference on Structural Integrity 2019 - Funchal, Madeira, Portugal
Duration: 2 Sept 20195 Sept 2019
Conference number: 3rd
https://www.sciencedirect.com/journal/procedia-structural-integrity/vol/17/suppl/C (Proceedings)

Conference

ConferenceInternational Conference on Structural Integrity 2019
Abbreviated titleICSI 2019
Country/TerritoryPortugal
CityFunchal, Madeira
Period2/09/195/09/19
Internet address

Keywords

  • Biaxial
  • BS 7910
  • Cruciform
  • ECA
  • R6

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