Plastic η factors based on load-CMOD records for SE(B) toughness testing specimens

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This paper addresses the accuracy of the experimental J estimation equation based on the load-CMOD curve for SE(B) specimens, proposed by Kirk and Dodds. Systematic investigations, based on 2-D FE analysis with realistic stress strain data for various materials, show that the estimation equation by Kirk and Dodds is not sensitive to the material but shows a large error for very deep cracks such as a/W=0.7. Based on slip line field analysis, a slight modification to the J estimation equation by Kirk and Dodds is given, then provides consistent results for all possible crack lengths.

Original languageEnglish
Pages (from-to)133-138
Number of pages6
JournalKey Engineering Materials
Issue number187 PART 1
Publication statusPublished - 2000 Dec 1
Externally publishedYes



  • Finite Element Analysis
  • J-Integral
  • Limit Analysis
  • Toughness Testing Standards

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering (miscellaneous)

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