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Smart carbon/epoxy composites: Filament winding with embedded sensor
Abstract
A new class of piezo-sensors was synthesized by coating a thin film of piezoelectric zinc oxide on plate conductors, metal wires and carbon fibers. The piezo-sensors were embedded into structural materials and their feasibility was shown for sensing vibration, damage and acoustic emission. An optimum condition for a magnetron sputtering gun system was determined to effectively coat well-oriented piezoelectric zinc oxide films on the substrates. A numerically controlled, three axis winder with thermal control, was used to fabricate smart, high strength, low weight, continuous fibrous composites. A pneumatic actuated press was developed as a nondestructive test instrument. A stress relaxation experiment was converted to the frequency domain via a Fourier transform technique. Results show the complex modulus as a function of frequency and temperature. Necessary theoretical work was conducted to interpret the meaning of the signals from the piezo-sensors, embedded in simple beams and cylindrical specimens.
Subject Area
Chemical engineering|Materials science|Mechanics
Recommended Citation
Chen, Song-Jang, "Smart carbon/epoxy composites: Filament winding with embedded sensor" (1993). ETD collection for University of Nebraska-Lincoln. AAI9322790.
https://digitalcommons.unl.edu/dissertations/AAI9322790