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首页> 外文期刊>Key engineering materials >Smart Cure Monitoring Method of Carbon/Epoxy Laminates using Electric Capacitance Change with Applied Alternating Current Frequency
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Smart Cure Monitoring Method of Carbon/Epoxy Laminates using Electric Capacitance Change with Applied Alternating Current Frequency

机译：Smart Cure Monitoring Method of Carbon/Epoxy Laminates using Electric Capacitance Change with Applied Alternating Current Frequency

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摘要

Authors have developed an electric resistance change method for delamination monitoring of carbon/epoxy composite laminates. The method employs reinforcement fibers as sensors; electrodes are co-cured. Co-cured electrodes for delamination monitoring are adopted in the present study as sensors for monitoring the degree of cure. This study proposes a new method using electrical capacitance change for monitoring the degree of cure without using additional sensors. Applying alternating current between electrodes during the cure process provides dielectric properties of carbon/epoxy composites. As with the conventional cure monitoring method using extra dielectric sensors, the degree of cure of composites is monitored by measuring the dielectric constant of composites. The dielectric constant of epoxy resin changes concomitant with change of frequency of applied alternating current (AC). Using dependency of the applied AC frequency of the dielectric constant, the degree of cure is measured directly. The proposed method is applied to single and multi-ply carbon/epoxy composite laminates. The method demonstrates excellent estimations of the degree of cure without additional sensors.

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