Micromechanics-based estimates on the macroscopic fracture toughness of micro-particulate composites

Gregory A. Bouché, Ange Therese Akono*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We investigate the macroscopic fracture toughness of multi-phase materials within the framework of fracture mechanics and micromechanics. Starting with the Eshelby inclusion problem, we provide estimates on the critical energy release. We take into account the elastic and fracture properties of the micro-constituents, the microstructure and the phase volume fractions by considering three schemes: dilute, Mori-Tanaka and generalized self-consistent. In turn, the theoretical model is validated by scratch tests experiments conducted on glass-reinforced polymer composites. We also apply our theoretical framework to porous clay-based ceramics. In both cases, the agreement between experiments and theory is excellent.

Original languageEnglish (US)
Pages (from-to)243-257
Number of pages15
JournalEngineering Fracture Mechanics
StatePublished - Nov 1 2015


  • Brittle fracture
  • Composites
  • Ductile-to-brittle transition
  • Effective stress intensity factor
  • Toughness testing

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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