Damage Detection Using Piezoceramic and Magnetostrictive Sensors and Actuators
Damage Detection Algorithms and Techniques
Published Online: 15 SEP 2009
Copyright © 2009 John Wiley & Sons, Ltd. All rights reserved.
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. .
- Published Online: 15 SEP 2009
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.
- constitutive model;
- finite elements