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    Volume 4, Issue 1 (April 1982)

    Strain Rate, Temperature, and Humidity Influences on Strength and Moduli of a Graphite/Epoxy Composite

    CODEN: CTROAD

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    Abstract

    Results of an experimental study of the influence of strain rate, temperature, and humidity on the mechanical behavior of a graphite/epoxy fiber composite are presented. Three principal strengths (longitudinal, transverse, and shear) and four basic moduli (longitudinal, transverse, axial shear, and major Poisson's ratio) of a unidirectional graphite/epoxy (T300/5208) composite were studied as functions of strain rate, temperature, and humidity. Each test was performed at a constant tensile strain rate in an environmental chamber providing simultaneous temperature and humidity control. Before being tested, specimens were given a moisture preconditioning treatment at 60°C. Values for the matrix-dominated moduli and strength were significantly influenced by both environmental and rate parameters, whereas the fiber-dominated moduli were not. However, the longitudinal strength was significantly influenced by temperature and moisture content. A qualitative explanation for these observations is presented.


    Author Information:

    Lifshitz, JM
    professor, Technion—Israel Institute of Technology, Haifa,


    Stock #: CTR10755J

    ISSN: 0884-6804

    DOI: 10.1520/CTR10755J

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    Author
    Title Strain Rate, Temperature, and Humidity Influences on Strength and Moduli of a Graphite/Epoxy Composite
    Symposium , 0000-00-00
    Committee D30