Mixed-mode fracture of adhesively bonded metallic joints under quasi-static loading

Hafiz T Ali, Magd M. Abdel Wahab, Andrew David Crocombe, P. A. Smith, Hafiz T Ali

Research output: Contribution to journalArticle (Academic Journal)peer-review

42 Citations (Scopus)


Quasi-static tests have been carried out to characterise mixed-mode fracture using a Double Cantilever Beam (DCB) specimen. The DCB consists of equal thickness mild steel adherends bonded with FM-73M epoxy adhesive and is tested under pure mode I, pure mode II and a range of mode-mixity conditions, using a relatively simple loading fixture. The test method is analysed using closed-form and finite element methods, which agree well provided that the adhesive deformation is considered. The strain energy release rate components at fracture are presented in a conventional GI (mode I)-GII (mode II) failure plot using closed-form Linear Elastic Fracture Mechanics (LEFM) methods reported previously in the literature. The results showed that the strain energy release rate is enhanced in the situation of the mode II (in-plane shearing) dominated mixed mode condition as compared to the mode I (opening mode) dominated mixed mode.
Original languageEnglish
Pages (from-to)3434-3445
Number of pages12
JournalEngineering Fracture Mechanics
Issue number17
Publication statusPublished - 1 Nov 2010


  • FEA
  • Linear Elastic Fracture Mechanics (LEFM)
  • Mixed-mode loading
  • Strain energy release rate (SERR)


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