Wide Band Tunable Mechanical Resonator Employing the ΔE Effect of Terfenol-D
Source abstract
Abstract
The control of Terfenol-D’s operational elastic modulus offers opportunities for novel devices and applications capitalizing on real-time changes in material stiffness. This work describes the development and testing of a Terfenol-D transducer employed as a wide-band variable frequency mechanical resonator. The design and construction of such a wide-band mechanical resonator for testing under controlled thermal, magnetic and dynamic mechanical load conditions are described. Changes in Terfenol-D’s elastic modulus, the ΔE effect, approaching 266% are demonstrated in the mechanical resonator utilizing a range of d.c. applied magnetic field levels of less than 61.0 kA/m. The elastic modulus and damping characteristics of Terfenol-D, critical to the successful design of devices employing the ΔE effect, are examined.
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Research context
OpenAlex topics: Magnetic Properties and Applications · Acoustic Wave Resonator Technologies · Ultrasonics and Acoustic Wave Propagation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Aerospace Engineering and Engineering Mechanics, Iowa State University, Ames, IA 50011, USA
Aerospace Engineering, University of Maryland, College Park, MD 20742, USA
References (12)
Show source-provided references
1. Clark, A.E. and Savage, H.T. 1975. “Giant Magnetically Induced Changes in Elastic the Moduli in Tb3Dy7Fe2,” IEEE Transactions on Sonics and Ultrasonics, Su-22(1): 50–52 .10.1109/T-SU.1975.30775 ↗
2. Duffing, G. 1918. Erwugene Schwingungen bei Veranderlicher Eigenfrequenz , F. Vieweg u. Sohn, Braun-schweig, Germany.
3. Hathaway, K.B., Clark, A.E. and Teter, J.P. 1995. “Magnetomechanical Damping in Giant Magnetostrictive Alloys,” Metallurgical and Materials Transactions A, 26A: 2797–2801 .10.1007/BF02669638 ↗
4. James, M.L., Smith, G.M., Wolford, J.C. and Whaley, P.W. 1989. Vibration of Mechanical and Structural Systems, Harper and Row Publishers, New York .
5. Kellogg, R.A. 2000. The Delta-E Effect in Terfenol-D and its Application in a Tunable Mechanical Resonator , M.S Thesis, Iowa State University, Ames, IA.
6. 10.1088/0034-4885/18/1/30510.1088/0034-4885/18/1/305 ↗
7. McConnell, K.G. 1995. Vibration Testing, Theory and Practice, John Wiley and Sons, Inc., New York .
8. Rao, S.S. 1995. Mechanical Vibrations, 3rd edn, Addison-Wesley Publishing Company, Reading, MA .
9. Riley, W.F. and Zachary, L.W. 1989. Intr. to Mechanics of Materials, John Wiley and Sons, New York .
10. 10.1109/TMAG.1975.105879110.1109/TMAG.1975.1058791 ↗
11. Shigley, S.E. and Mischke, C.R. 1990. Mechanisms, A Mechanical Designer’s Workbook, McGraw-Hill, Inc., New York .
12. 10.1063/1.36207410.1063/1.362074 ↗