Electromagneto-mechanical Behavior of Giant Magnetostrictive/Piezoelectric Laminates under Electric Fields for Self-Sensing Cantilever Actuators

Abstract

This work deals with the electromagneto-mechanical behavior of self-sensing giant magnetostrictive/piezoelectric laminated composites under electric fields both numerically and experimentally. The cantilever laminated composite is fabricated using thin magnetostrictive Terfenol-D and piezoelectric PZT layers. The magnetostriction of the laminated composite is first measured. Next, a nonlinear finite element analysis is performed to evaluate the second-order magnetoelastic constants in Terfenol-D layer bonded to PZT layer, using measured data. The tip deflection, internal stresses and induced magnetic field for the giant magnetostrictive/piezoelectric laminated composites under electric fields are then discussed in detail. Experimental results on the tip deflection and magnetic induction change due to electric fields, which verify the model, are also presented.

Dynamic electromagneto-mechanical behavior of clamped-free giant magnetostrictive/piezoelectric laminates under AC electric fields

“…The results also show the small differences between induced magnetic fields for h m = 1 and 3 mm. It is interesting to note that we can see a similar trend in our previous work for two-layered laminate under a DC electric field [8]. The comparison between the experimental results for the two-layered laminates with h m = 1 and 3 mm and the numerical predictions yields a good agreement.…”

“…It should be noted that before carrying out simulations, a mesh sensitivity study was performed to ensure that the mesh was fine enough. The finite element computations were provided by modifying the program with routines developed in our previous works [8,9].…”

“…Though much research on the direct ME effect of the magnetostrictive/piezoelectric laminates is found in the literature, the investigations on the characterization of the converse ME effect are very few [6,7]. Recently, Mori et al studied the electromagnetomechanical behavior of two-layered [8] and three-layered [9] magnetostrictive/piezoelectric laminates under DC electric field.…”

“…12 and 1.0 × 10 −13 m 2 A −2[8], and the constants m 33 of h m = 1 and 3 mm of three-layered laminate are 5.2 × 10 −12 and 2.3 × 10 −12 m 2 A −2[9], respectively. The coercive electric field of C-91 is about 0.35 MV m −1[21].…”