Development of Stress Gradient Enhanced Piezoelectric Actuator Composites

Abstract

This report describes a multifunctional skin material that integrates piezoelectric layers to achieve multiple functions. These materials act as structural elements, have embedded piezoelectric actuation for shape control and active vibration suppression, and have in integral NDE system that utilizes a portion of the piezoelectric element for the detection of delaminations and cracks. Classical lamination theory modified to include piezoelectric layers was used as a design tool for the development of the skin material. The design utilized differential thermal expansion during processing to induce a residual compressive stress in the piezoelectric layer of the active skins resulting in high reliability and good resistance to fatigue.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2004
Accession Number
ADA435846

Entities

People

  • Christopher S Lynch

Organizations

  • Georgia Tech

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Biomedical
  • Ground and Sea Platforms
  • Human Systems
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Ceramic Materials
  • Composite Materials
  • Delamination
  • Detection
  • Laminates
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Micromechanics
  • Piezoelectric Materials
  • Strain Gages
  • Thermal Expansion
  • Vibration

Readers

  • Robotics and Automation.
  • Structural Health Monitoring of Composite Structures.