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Proceedings Paper

Mechanical and vibration testing of carbon fiber composite material with embedded piezoelectric sensors
Author(s): Kirsten P. Duffy; Bradley A. Lerch; Nathan G. Wilmoth; Nicholas Kray; Gregory Gemeinhardt
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Paper Abstract

Piezoelectric materials have been proposed as a means of decreasing turbomachinery blade vibration either through a passive damping scheme, or as part of an active vibration control system. For polymer matrix fiber composite (PMFC) blades, the piezoelectric elements could be embedded within the blade material, protecting the brittle piezoceramic material from the airflow and from debris. Before implementation of a piezoelectric element within a PMFC blade, the effect on PMFC mechanical properties needs to be understood. This study attempts to determine how the inclusion of a packaged piezoelectric patch affects the material properties of the PMFC. Composite specimens with embedded piezoelectric patches were tested in four-point bending, short beam shear, and flatwise tension configurations. Results show that the embedded piezoelectric material does decrease the strength of the composite material, especially in flatwise tension, attributable to failure at the interface or within the piezoelectric element itself. In addition, the sensing properties of the post-cured embedded piezoelectric materials were tested, and performed as expected. The piezoelectric materials include a non-flexible patch incorporating solid piezoceramic material, and two flexible patch types incorporating piezoelectric fibers. The piezoceramic material used in these patches was Navy Type-II PZT.

Paper Details

Date Published: 27 March 2012
PDF: 14 pages
Proc. SPIE 8341, Active and Passive Smart Structures and Integrated Systems 2012, 834116 (27 March 2012); doi: 10.1117/12.916769
Show Author Affiliations
Kirsten P. Duffy, The Univ. of Toledo (United States)
NASA Glenn Research Ctr. (United States)
Bradley A. Lerch, NASA Glenn Research Ctr. (United States)
Nathan G. Wilmoth, ASRC Aerospace Corp. (United States)
NASA Glenn Research Ctr. (United States)
Nicholas Kray, GE Aviation Systems (United States)
Gregory Gemeinhardt, GE Aviation Systems (United States)

Published in SPIE Proceedings Vol. 8341:
Active and Passive Smart Structures and Integrated Systems 2012
Henry A. Sodano, Editor(s)

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