Strength of Materials

, Volume 49, Issue 3, pp 349–360 | Cite as

Improving the Computational Analysis of Stress-Strain State and Fracture Resistance of Welded Joints Between Coolant Headers and PGV-1000M Steam Generator Vessel of Nuclear Power Station

  • V. V. Kharchenko
  • A. Yu. Chirkov
  • S. V. Kobel’skii
  • V. I. Kravchenko
SCIENTIFIC AND TECHNICAL SECTION
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The authors have outlined methodological principles and a procedure of performing the updated analysis of stress-strain state and fracture resistance of welded joints between coolant headers and PGV-1000M steam generator vessel. The paper gives the results of the elastic-plastic fracture resistance analysis of a welded joint containing variously shaped surface defects, in modeling a design operation cycle and an accident situation. According to the data obtained, the deformation loading history, residual technological stresses, and inclusion of surface damages have a significant effect on the design assessment of fracture resistance of a welding joint. It has been shown that the conventional linearly elastic calculation of fracture resistance of welded joints has an inadequate degree of conservatism and thus overestimates strength of the joints.

Keywords

steam generator welded joint elastic-plastic deformation loading history stress intensity factor defect predicted crack fracture resistance finite element method 

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  • V. V. Kharchenko
    • 1
  • A. Yu. Chirkov
    • 1
  • S. V. Kobel’skii
    • 1
  • V. I. Kravchenko
    • 1
  1. 1.Pisarenko Institute of Problems of StrengthNational Academy of Sciences of UkraineKievUkraine

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