Abstract
Moisture plays a significant role in influencing the mechanical behavior and long-term durability of polymer matrix composites (PMC’s). The common methods used to determine the moisture diffusion coefficients of PMCs are based on the solution of Fickian diffusion in the one-dimensional domain. Fick’s law assumes that equilibrium between the material surface and the external vapor is established instantaneously rather than over an extended period of time. A time dependent boundary condition has been shown to improve correlation with bulk diffusion measurements, but has not been verified experimentally. Surface moisture content in a toughened quasi-isotropic laminate system, [0/±60]s, was analyzed using Nuclear Reaction Analysis (NRA). It was found that the moisture content increased nearly linearly with time.
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References
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Pilli, S., Shutthanandan, V., Smith, L. (2011). Measuring Time Dependent Diffusion in Polymer Matrix Composites. In: Proulx, T. (eds) Time Dependent Constitutive Behavior and Fracture/Failure Processes, Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9794-4_23
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DOI: https://doi.org/10.1007/978-1-4419-9794-4_23
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