Effect of loading rate on the monotonic tensile behavior of a continuous-fiber-reinforced glass-ceramic matrix composite

Bent F. Sørensen, J.W. Holmes

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The stress-strain behavior of a continuous-fiber-reinforced ceramic matrix composite has been measured over a wide range of loading rates (0.01 to 500 MPa/s). It was found that the loading rate has a strong effect on almost every feature of the stress-strain curve: The proportionality stress, the composite strength and failure strain increase with increasing loading rate. The microstructural damage varies also with the loading rate; with increasing loading rate, the average matrix crack spacing increases and the average fiber pullout length decreases. Using simple models, it is suggested that these phenomena are caused partly by time-dependent matrix cracking (due to stress corrosion) and partly by an increasing interfacial shear stress with loading rate.
    Original languageEnglish
    JournalJournal of the American Ceramic Society
    Volume79
    Issue number2
    Pages (from-to)313-320
    ISSN0002-7820
    DOIs
    Publication statusPublished - 1996

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