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Proceedings Paper

Integration and reliability of active fiber composite (AFC) sensors/actuators in carbon/epoxy laminates
Author(s): Mark M. Melnykowycz; Alberto Belloli; Paolo Ermanni; Michel Barbezat
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Paper Abstract

In the current study Active Fiber Composites (AFC) utilizing Lead-Zirconate-Titanate (PZT) fibers with Kapton(R) screen printed interdigitated electrodes (IDE) were integrated into carbon fiber reinforced plastic (CFRP) laminates to investigate integration issues associated with smart structures and host laminate integrity. To aid in this goal surrogate or "dummy" AFC (DAFC) using a composite core and Kapton(R) outer layers (to match the longitudinal mechanical and interface properties of the AFC) were employed. These DAFC were used in place of real AFC to expedite test specimen manufacture and evaluation. This allowed efficient investigation of the impact of an integrated AFC-like inclusion on laminate mechanical integrity. Laminates with integrated AFC were additionally tested with signal monitoring to assess AFC health during the test. Investigation into laminate failure was accomplished via a finite element model of the system which was created in ANSYS to investigate failure in the composite plies. Tsai-Wu failure criterion was calculated to investigate laminate failure characteristics. Integration of AFC into CFRP laminates degraded laminate strength by 13.3% using insertion integration and 7.8% using the interlacing integration technique. The finite element model showed that interlacing integration enabled distribution of critical forces over the entire laminate while insertion integration led to critical forces concentrating over the integration region.

Paper Details

Date Published: 6 April 2006
PDF: 11 pages
Proc. SPIE 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics, 61701J (6 April 2006); doi: 10.1117/12.658639
Show Author Affiliations
Mark M. Melnykowycz, EMPA (Switzerland)
Alberto Belloli, ETH Zurich (Switzerland)
Paolo Ermanni, ETH Zurich (Switzerland)
Michel Barbezat, EMPA (Switzerland)

Published in SPIE Proceedings Vol. 6170:
Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics
William D. Armstrong, Editor(s)

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