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Prediction of Long-term Creep of Composites from Doubly-shifted Polymer Creep Data

Mechanical and Aerospace Engineering West Virginia University, Morgantown, WV 26506-6106, USA, Ever.Barbero{at}mail.wvu.edu

Environmental effects on the creep response of composites are of great interest because these materials are very sensitive to temperature and other environmental conditions. Short and long-term creep effects have been studied for composites under various environmental conditions, but most studies rely on experimental testing of particular laminates. Here, a novel micro-mechanical/laminate model is developed to predict the creep response of laminated polymer matrix composites from matrix creep data. Furthermore, a novel two-parameter superposition method is used to predict the long-term response of the polymer matrix as a function of two environmental parameters: moisture and temperature. The procedure used to compute the two shift factors is described. The resulting master curve can be used to predict the long-term properties of the matrix and for any temperature and humidity conditions. Once the matrix behavior is known, the micro-mechanical/ laminate model allows for accurate prediction of long-term properties of arbitrary laminates for the same conditions.

Key Words: PMC • creep • Analytical Modeling • Thermo Mechanical Testing • VARTM.

This version was published on September 1, 2009

Journal of Composite Materials, Vol. 43, No. 19, 2109-2124 (2009)
DOI: 10.1177/0021998308098239


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