Long-Term Durability and Integrity of Built-In Piezoelectric-Based Active Sensing Network in Structures
Abstract
Piezoelectric actuators (PZT) are widely used for Structural Health Monitoring Systems (SHM) and are mostly surface mounted or embedded into a structure with a polymer adhesive layer. The long-term durability and integrity of piezoelectric-based active sensing networks surface-mounted on metallic structures is studied. Numerical and experimental investigations based on nanotechnologies were conducted to characterize and improve the durability, performance and integrity of structures with integrated piezoelectric materials. A Spectral Element based code (SEM) equipped with a coupled electro-mechanical field solver has been developed to simulate ultrasonic Lamb wave propagation in 3-D structures with built-in piezoelectric sensors. An experimental investigation showed that the integrity of the PZT/structure interlace is critical for the performance of PZT actuators. Hie electro-mechanical coupling between PZT actuators and a hosting aluminium plate was found to vary with the interface debonding. The design of a carbon nanolube coated piezoelectric actuator (C-PZT) is presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 2007
- Accession Number
- ADA589013
Entities
People
- Fu-Kuo Chang
- Giulia Lanzara
- Sungwon Ha
- Youngki Koon
- Yujun Kim
Organizations
- Stanford University