Failure criteria for brittle elastic materials

Zohar Yosibash*, Arie Bussiba, Ilan Gilad

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The validity of several known failure initiation criteria at reentrant corners in brittle elastic materials is examined and a simple one is proposed. Their predictions, under mode I stress field, are compared to experimental observations carried out on PMMA (polymer) and Alumina-7%Zirconia (ceramic) V-notched specimens. Because all realistic V-notched reentrant corners are blunt, a detailed experimental procedure has been followed, focusing on specimens with different notch tip radii. It is demonstrated that by assuming a sharp V-notch, some failure criteria predict reasonably well the experimental findings, and that corrections are needed in order for these to take into consideration the realistic radius at the notch tip.

Original languageEnglish
Pages (from-to)307-333
Number of pages27
JournalInternational Journal of Fracture
Issue number3-4
StatePublished - Feb 2004
Externally publishedYes


  • Failure initiation
  • Generalized stress intensity factors
  • V-notch


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