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Proceedings Paper

Nonlinear behavior of coupled magnetostrictive material systems analytical/experimental
Author(s): Mark M. Roberts; Milan Mitrovic; Gregory Paul Carman
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Paper Abstract

In this paper, we present a nonlinear constitutive relation for magnetostrictive materials that includes coupling between temperature/preload and magnetic field strengths. The nonlinear constitutive relations are also integrated into a 1-dimensional nonlinear finite element model for studying structural components or composite materials containing magnetostrictive materials. The accuracy of the nonlinear constitutive relation is evaluated by comparing experimental results obtained on a Terfenol-D rod operating under both magnetic field and stress biases with theoretical values present in the literature. Results indicate that the model adequately predicts the nonlinear strain/field relations in specific regimes. Experimental tests, conducted on monolithic samples of different geometry, suggests that size effects may be important. A manufacturing process and preliminary experimental tests are also presented for a 1 - 3 magnetostrictive composite sample.

Paper Details

Date Published: 22 May 1995
PDF: 14 pages
Proc. SPIE 2441, Smart Structures and Materials 1995: Smart Materials, (22 May 1995); doi: 10.1117/12.209802
Show Author Affiliations
Mark M. Roberts, Univ. of California/Los Angeles (United States)
Milan Mitrovic, Univ. of California/Los Angeles (United States)
Gregory Paul Carman, Univ. of California/Los Angeles (United States)

Published in SPIE Proceedings Vol. 2441:
Smart Structures and Materials 1995: Smart Materials
A. Peter Jardine, Editor(s)

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