30 May 1996 In-situ damage monitoring of composite structures
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Abstract
The feasibility of embedding piezoelectric transducers in composite panels for the measurement of phase velocities is presented. The theoretical dispersion curves for a composite panel are generated and the experimental measurements of phase velocities compared. In this paper the method for testing and for evaluating the experimental phase velocities is developed. The experimental methodology is validated by excellent agreement to theoretical values. This measurement methodology is used to detect holes drilled in composite plates to show the usefulness of the procedure. Signal losses of between 10% and 48% can be detected with this embedded transducer method.
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Timothy E. Neary, Dryver R. Huston, Junru Wu, William B. Spillman, "In-situ damage monitoring of composite structures", Proc. SPIE 2718, Smart Structures and Materials 1996: Smart Sensing, Processing, and Instrumentation, (30 May 1996); doi: 10.1117/12.240862; https://doi.org/10.1117/12.240862
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