A revised failure criterion for brittle elastic materials under mixed-mode loading in 2-D

Zohar Yosibash, Brigit Mittelman

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We revise the failure criterion by Yosibash, Priel and Leguillon for V-notched 2-D domains made of brittle elastic materials (Yosibash et al., 2006) under mixed-mode loading. It is based on a finite fracture mechanics (FFM) concept that requires the determination of a finite virtual crack that simultaneously satisfies the normal stress criterion and the energy release rate (ERR) criterion. The FFM ERR criterion is extended to include mode II toughness (GIIc) and reduces to the classical fracture mechanics failure criterion under constrained mode II at the limit when the V-notch solid angle approaches 2π. The revised criterion predictions of failure load and failure initiation angle are compared to experimental observations on PMMA V-notched specimens under mixed mode loading. The predictions compared to the original criterion are slightly improved, especially as the mode mixity ratio increases.

Original languageEnglish
Pages (from-to)149-156
Number of pages8
JournalTheoretical and Applied Fracture Mechanics
Volume84
DOIs
StatePublished - 1 Aug 2016

Keywords

  • Generalized stress intensity factors
  • Mixed-mode
  • V-notch

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