Nonlinear behavior of coupled magnetostrictive material systems analytical/experimental

Mark M. Roberts; Milan Mitrovic; Gregory Paul Carman

doi:10.1117/12.209802

22 May 1995 Nonlinear behavior of coupled magnetostrictive material systems analytical/experimental

Mark M. Roberts, Milan Mitrovic, Gregory Paul Carman

Proceedings Volume 2441, Smart Structures and Materials 1995: Smart Materials; (1995) https://doi.org/10.1117/12.209802
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

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.

Citation Download Citation

Mark M. Roberts, Milan Mitrovic, and Gregory Paul Carman "Nonlinear behavior of coupled magnetostrictive material systems analytical/experimental", Proc. SPIE 2441, Smart Structures and Materials 1995: Smart Materials, (22 May 1995); https://doi.org/10.1117/12.209802

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