Accession Number:

ADA589013

Title:

Long-Term Durability and Integrity of Built-In Piezoelectric-Based Active Sensing Network in Structures

Descriptive Note:

Final rept. 1 Apr 2004-31 Mar 2007

Corporate Author:

STANFORD UNIV CA

Report Date:

2007-03-31

Pagination or Media Count:

94.0

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 PZTstructure 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.

Subject Categories:

  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE