Abstract
A new time-temperature extrapolation method is proposed for the off-axis creep rupture behavior of unidirectional polymer matrix composites at different stress levels over a range of temperature. It is developed using the framework of the classic Kachanov-Rabotnov damage model in conjunction with a modified temperature shift factor of the Arrhenius type that takes into account a rapid degradation in the strength of a polymer in the vicinity of its glass transition temperature. A particular emphasis is placed on establishment of an analytical formula for extrapolating creep rupture data that depend not only on temperature but also on the direction of creep loading. Validity of the proposed master curve approach to prediction of anisotropic creep life of a unidirectional polymer matrix composite is evaluated by comparing calculated and experimental results. It is also shown that the time-temperature extrapolation method suggests a new and general form of multiaxial creep failure criterion for orthotropic polymer matrix composites.
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Kawai, M. (2013). A Grand Master Curve Approach for Off-Axis Creep Rupture Behavior of Orthotropic Fiber Composites at Different Temperatures. In: Altenbach, H., Kruch, S. (eds) Advanced Materials Modelling for Structures. Advanced Structured Materials, vol 19. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35167-9_21
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DOI: https://doi.org/10.1007/978-3-642-35167-9_21
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