Journal of Materials Science

, Volume 28, Issue 19, pp 5340–5344 | Cite as

Study of elastic-plastic fracture toughness determination

  • J. Fernández-Sáez
  • J. Chao
  • J. Durán
  • J. M. Amo


The elastic-plastic fracture toughness viaJ-integral and crack tip opening displacement (CTOD) has been obtained in two structural steels using several fitting equations representing the resistance curve of the material. The toughness is determined as the values corresponding to the critical stretched zone width (SZW) on theR-curves and with respect to 0.2 mm crack growth. The SZW measurements were performed by scanning electron microscopy. The various toughness values have been compared and the importance of using appropriateR-curves based on physical considerations has been pointed out. TheJ-CTOD relationship during the blunting process has been experimentally investigated from load-displacement records of the fracture test.


Polymer Microscopy Electron Microscopy Scanning Electron Microscopy Fracture Toughness 
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Copyright information

© Chapman & Hall 1993

Authors and Affiliations

  • J. Fernández-Sáez
    • 1
  • J. Chao
    • 1
  • J. Durán
    • 1
  • J. M. Amo
    • 1
  1. 1.Centro Nacional de Investigaciones MetalúrgicasMadridSpain

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