Mechanical and vibration testing of carbon fiber composite material with embedded piezoelectric sensors

Kirsten P. Duffy; Bradley A. Lerch; Nathan G. Wilmoth; Nicholas Kray; Gregory Gemeinhardt

doi:10.1117/12.916769

27 March 2012 Mechanical and vibration testing of carbon fiber composite material with embedded piezoelectric sensors

Kirsten P. Duffy, Bradley A. Lerch, Nathan G. Wilmoth, Nicholas Kray, Gregory Gemeinhardt

Proceedings Volume 8341, Active and Passive Smart Structures and Integrated Systems 2012; 834116 (2012) https://doi.org/10.1117/12.916769
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

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.

Citation Download Citation

Kirsten P. Duffy, Bradley A. Lerch, Nathan G. Wilmoth, Nicholas Kray, and Gregory Gemeinhardt "Mechanical and vibration testing of carbon fiber composite material with embedded piezoelectric sensors", Proc. SPIE 8341, Active and Passive Smart Structures and Integrated Systems 2012, 834116 (27 March 2012); https://doi.org/10.1117/12.916769

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