Abstract
An experimental investigation of the dynamic behavior of a 1-3 type magnetostrictive composite is described in this paper so as to determine fundamental material properties pertinent to the design of transducers, actuators, and motors. Terfenol-D particulates of random crystal orientation were embedded and magnetically aligned in a passive epoxy matrix to form a 1-3 composite with 51 % Terfenol-D volume fraction. The linear dynamic magnetomechanical properties of the composite, including two Young's moduli (E33Hand E33B), magnetomechanical coupling coefficient (k33), dynamic relative permeability (μr33), dynamic strain coefficient (d33), mechanical quality factor (Qm), and the ratio of the dynamic strain coefficient to the dynamic susceptibility (d33/ χ33), were evaluated experimentally using a swept sinusodal magnetic drive field of 1 kA/m from 1 to 100 kHz at various magnetic bias field levels of 5 to 140 kA/m. Results show the dependence of composite properties on bias field and frequency with no evidence of eddy current losses. The observed eddy current effect is in good agreement with the prediction of classical eddy current theory. This suggests that the composite can provide superior high-frequency performance when compared to monolithic Terfenol-D. Implications for high-frequency applications of the material are also presented.
| Original language | English |
|---|---|
| Pages (from-to) | 2766-2775 |
| Number of pages | 10 |
| Journal | Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference |
| Volume | 4 |
| Publication status | Published - 1 Jan 2002 |
| Externally published | Yes |
| Event | 43rd Structures, Structural Dynamics and Materials Conference - Denver, CO, United States Duration: 22 Apr 2002 → 25 Apr 2002 |
ASJC Scopus subject areas
- Architecture
- General Materials Science
- Aerospace Engineering
- Mechanics of Materials
- Mechanical Engineering