Standard Article

Damage Detection Using Piezoceramic and Magnetostrictive Sensors and Actuators

Simulation

Damage Detection Algorithms and Techniques

  1. Srinivasan Gopalakrishnan

Published Online: 15 SEP 2009

DOI: 10.1002/9780470061626.shm069

Encyclopedia of Structural Health Monitoring

Encyclopedia of Structural Health Monitoring

How to Cite

Gopalakrishnan, S. 2009. Damage Detection Using Piezoceramic and Magnetostrictive Sensors and Actuators. Encyclopedia of Structural Health Monitoring. .

Author Information

  1. Indian Institute of Science, Department of Aerospace Engineering, Bangalore, India

Publication History

  1. Published Online: 15 SEP 2009

Abstract

In this article, detection of damage using some of the commercially available smart sensors/actuators is addressed. This study considers two important smart materials, namely, the lead zirconate titanate (PZT), which is a piezoceramic material and Terfenol-D, which is a magnetostrictive material. Both of these smart material types have two constitutive laws, namely, the sensing and actuation laws. Here, we use sensing law, wherein the electric displacements are coupled to the mechanical strain and the electrical field in the case of PZT material, while in Terfenol-D, the sensing law couples the magnetic flux density to the mechanical strain and the magnetic field. Finite elements are used as mathematical models for the prediction of damage. Different types of structures under both static and dynamic loadings are considered to demonstrate the effectiveness of the smart sensors in predicting the presence of damage. Some experimental results are provided to correlate the results obtained from the finite elements.

Keywords:

  • sensors;
  • actuators;
  • constitutive model;
  • PZT;
  • Terfenol-D;
  • delamination;
  • finite elements