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Temperature Dependence of Resin Flow in a Resin Film Infusion (RFI) Process by Ultrasound Imaging

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Abstract

Ultrasonic imaging in the C-scan mode was used in conjunction with the amplitude of the reflected signal to measure the temperature dependence of resin flow rate in single layers of woven carbon fabric. The RFI samples were vacuum-bagged and scanned in a water tank at 50°C, 60°C, 70°C, and 80°C. The measured flow rates were plotted versus inverse viscosity to determine the permeability in the thin film, non-saturated system. The permeability values determined in this work were consistent with permeability values reported in the literature. Capillary flow was not observed at the temperatures and times required for pressurized flow to occur. The flow rate at 65°C was predicted from the measured flow rates, and then measured in a 10-layer laminate. The investigation demonstrates that ultrasonic imaging in the C-scan mode in conjunction with the amplitude of the reflected signal is an effective method for measuring resin flow through fabric.

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Acknowledgements

This work was supported by Cytec Engineered Materials, Inc., which also donated the materials used. Cytec provided the viscosity data. The authors are grateful to Chris Bongiovanni and Jack Boyd of Cytec Engineered Materials, Inc. for their support.

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  1. Department of Materials Science, University of Southern California, Los Angeles, CA, 90089-0241, USA

    S. Thomas & S. R. Nutt

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  1. S. Thomas
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Correspondence to S. Thomas.

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Thomas, S., Nutt, S.R. Temperature Dependence of Resin Flow in a Resin Film Infusion (RFI) Process by Ultrasound Imaging. Appl Compos Mater 16, 183–196 (2009). https://doi.org/10.1007/s10443-009-9086-6

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