Hostname: page-component-84b7d79bbc-c654p Total loading time: 0 Render date: 2024-07-28T10:16:46.096Z Has data issue: false hasContentIssue false
  • English
  • Français

Energy Absorption and Damping in Magnetostrictive Composites

Published online by Cambridge University Press:  15 February 2011

G. P. Mcknight  and
G. P. Carman
G. P. Mcknight
Affiliation:
MAE Department, University of California, Los Angeles, CA 90095, mcknight@seas.ucla.edu
G. P. Carman
Affiliation:
MAE Department, University of California, Los Angeles, CA 90095, carman@seas.ucla.edu
Get access

Abstract

The mechanical energy absorption characteristics of several polymer matrix Terfenol-D composites were evaluated experimentally. Magnetostrictive composites absorb energy through domain level processes that couple mechanical and magnetic energies. The testing consisted of mechanically cycling the materials at different stress amplitudes (combined compression and tension) at a single frequency. Results indicate that the magnetostrictive composites exhibit a unique combination of high damping properties in conjunction with a relatively high modulus. The measured tan delta values for the materials are functionally dependent upon the stress amplitude. In general, as the stress amplitude increased, the damping or energy absorbed during one cycle decreased. Results also indicate that damping is directionally dependent (i.e. anisotropic) and that bias magnetic fields decrease the energy absorption. The volume fraction of the composites did not play a significant role in the magnitude of damping. This effect may be related to the inherent pre-stress imparted on the particle by the resin during cure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 604: Symposium LL – Materials for Smart Systems III , 1999 , 267
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Brodt, M. and Lakes, R.S., Journal of Composite Materials 14, 1823–1833 (1995)10.1177/002199839502901402Google Scholar
2 Teter, J.P., Hathaway, K.B., Clark, A.E., Journal of Applied Physics 79 B, 6213–6215 (1996)10.1063/1.362074Google Scholar
3 Hathaway, K.B., Clark, A.E., Teter, J.P., Metallurgical and Materials Transactions A 26A, 2797–2801 (1995)10.1007/BF02669638Google Scholar
4 Sandlund, L., Fahlander, M., Cedell, T., Clark, A.E., Restorff, J.B., Wun-Fogle, M., Journal of Applied Physics 75, 5656–5658 (1994)10.1063/1.355627Google Scholar
5 Duenas, T.A. and Carman, G.P., 1998 ASME, Anaheim CA, AD 57, MD 83, 63–73 (1998)Google Scholar
6 Goldie, J.H., Gerver, M.J., Olesky, J., Carman, G.P., Duenas, T.A., 1999 SPIE, Newport Beach CA, 3675, 223–235 (1999)Google Scholar