Damage development in woven fabric composites during tension-tension fatigue

U. Hansen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Impacted woven fabric composites were tested in tension-tension fatigue. In contrast to results from static testing, the effects of low energy impact damage in a fatigue environment were found to be the critical element leading to failure of the specimen. This difference emphasizes the need to identify and understand the fatigue damage mechanism. A relatively new non-destructive inspection technique using infrared thermography was found to be a very useful tool in detecting damage initiation and growth. Furthermore, this technique supplies valuable information to the characterization of the operating fatigue damage mechanism(s).

    Fatigue leads to a degradation of material properties. Consequently, in connection with impact induced local stress raisers, fatigue produces continuously changing non-uniform stress fields because of stress redistribution effects. Other models addressing evolution of fatigue damage in composite materials have not been able to simulate evolving nonuniform stress fields. Therefore. in the second part of this paper, an analytical/numerical approach capable of addressing these issues is also proposed.
    Original languageEnglish
    JournalJournal of Composite Materials
    Volume33
    Issue number7
    Pages (from-to)614-639
    ISSN0021-9983
    DOIs
    Publication statusPublished - 1999

    Keywords

    • fatigue
    • impact damage
    • woven fabric composites
    • thermal imaging

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