Effect of Electric Field on the Response of Clamped-Free
Magnetostrictive/Piezoelectric/Magnetostrictive Laminates
Kotaro Mori;  Fumio Narita;  Yasuhide Shindo

Source CMC: Computers, Materials & Continua, Vol. 23, No. 3, pp. 187-200, 2011
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Keywords magnetostrictive/piezoelectric mechanics, electronic laminates, detection and response characteristics
Abstract This work deals with the response of clamped-free magnetostrictive/piezoelectric/magnetostrictive laminates under electric field both numerically and experimentally. The laminate is fabricated using two magnetostrictive Terfenol-D layers and a soft piezoelectric PZT layer. Easy axis of Terfenol-D layers is length direction, while the polarization of PZT layer is the thickness direction. The magnetostriction of the Terfenol-D layers bonded to the upper and lower surfaces of the PZT layer is first measured. Next, a nonlinear finite element analysis is employed to evaluate the second-order magnetoelastic constants in the Terfenol-D layers bonded to the PZT layer using measured data. The induced magnetic field and internal stresses for the laminates under electric field parallel to the poling are then calculated and discussed in detail. In addition, the induced magnetic field is measured, and test results are presented to validate the predictions.
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