J and CTOD estimation for homogeneous and bi-material fracture toughness testing specimens

Yun Jae Kim, Hyungyil Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)


This paper proposes J and CTOD estimation schemes applied to fracture toughness testing, covering typical homogeneous and bi-material specimens. Recommendations are based on the plastic limit analysis (either slip line field or finite element limit analyses), assuming the rigid plastic material behavior. The main outcome of the present study is that the J and CTOD estimation schemes (both codified and non-codified), recommended for homogeneous specimens, can be equally used for bi-material specimens with interface cracks. The effect of yield strength mismatch in bi-material specimens on the the J-integral and CTOD is discussed.

Original languageEnglish
Pages (from-to)1079-1089
Number of pages11
JournalKSME International Journal
Issue number8
Publication statusPublished - 2001 Aug
Externally publishedYes



  • Bi-material specimen
  • Crack tip opening displacement
  • Fracture toughness testing
  • Interface crack
  • J-integral
  • Limit load
  • Strength mismatch

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this