Fractography of unfilled and particulate-filled epoxy resins

W. J. Cantwell, A. C. Roulin-Moloney, T. Kaiser

Research output: Contribution to journalArticlepeer-review

55 Scopus citations


The objective of this work was to analyse and understand the types of fracture surface morphology found in unfilled and particulate-filled epoxy resins in the light of the thermomechanical history of the specimen (loading rate or duration of loading, temperature, strain at break). Short-term tensile tests and long-term creep tests were conducted at four different temperatures. The fracture surface features were analysed using the scanning electron and optical microscopes and, where suitable, an image analyser. In order to correlate these morphologies with certain regimes of crack velocity, fracture mechanics tests were also conducted, varying the crack speed between 10-7 and 102 m sec-1. In the case of the filled resin, the lifetime under static loading is governed by a phase of slow, sub-critical crack growth which is manifested by resin-particle debonding. Thereafter, the crack accelerates and finally may reach terminal velocities depending on the amount of stored elastic energy available at the moment of fracture.

Original languageBritish English
Pages (from-to)1615-1631
Number of pages17
JournalJournal of Materials Science
Issue number5
StatePublished - May 1988


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