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Mechanical and Vibration Testing of Carbon Fiber Composite Material with Embedded Piezoelectric SensorsPiezoelectric 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.
Document ID
20120004180
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Duffy, Kirsten P.
(Toledo Univ. OH, United States)
Lerch, Bradley A.
(NASA Glenn Research Center Cleveland, OH, United States)
Wilmoth, Nathan G.
(ASRC Aerospace Corp. Cleveland, OH, United States)
Kray, Nicholas
(General Electric Aviation Evendale, OH, United States)
Gemeinhardt, Gregory
(General Electric Aviation Evendale, OH, United States)
Date Acquired
August 25, 2013
Publication Date
March 11, 2012
Subject Category
Composite Materials
Report/Patent Number
E-18172
Meeting Information
Meeting: SPIE Smart Structures and Materials Conference
Location: San Diego, CA
Country: United States
Start Date: March 11, 2012
End Date: March 15, 2012
Sponsors: International Society for Optical Engineering
Funding Number(s)
WBS: WBS 561581.02.08.03.43.04.04
Distribution Limits
Public
Copyright
Public Use Permitted.
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