Journal of Materials Science

, Volume 7, Issue 10, pp 1175–1191 | Cite as

The fracture energy of carbon-fibre reinforced glass

  • D. C. Phillips
Papers

Abstract

The fracture energy of carbon-fibre reinforced glass has been measured by the work of fracture technique, using specimens of varied geometry, Meaningful material properties were obtained only when crack propagation was controlled throughout failure. The work of fracture (γF) depended on strain-rate and fibre volume fraction, and was typically ∼3 kJm−2 for a 40 vol % specimen. Variations of work of fracture due to strain-rates have been related to the microstructure of the fracture surfaces and estimates have been obtained of the fibre-matrix interfacial shear stress during pull-out. Approximate estimates have been made of the fracture initiation energy (γI) by fracture mechanics analyses, γI was less than γF and no strain-rate sensitivity was detected. An attempt has been made to explain γI in terms of the initial rate of release of strain energy during fibre fracture.

Keywords

Shear Stress Fracture Surface Fracture Mechanic Initial Rate Fracture Energy 

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Copyright information

© Chapman and Hall Ltd 1972

Authors and Affiliations

  • D. C. Phillips
    • 1
  1. 1.Process Technology DivisionAEREHarwell, DidcotUK

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