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Indexed by:会议论文

Date of Publication:2006-01-01

Included Journals:CPCI-S

Page Number:655-660

Key Words:Giant Magnetostrictive Truansducer(GMT); hysteresis; Terfenol-D

Abstract:This paper addresses the effect of a varied external stress applying on the giant magnetostrictive transducer (GMT) in a varied external magnetic field. Due to the magnetization hysteresis characteristic of Terfenol-D, the strain of GMT inherits the hysteresis characteristic of Magnetization. So the performance of GMT strain repeatability is poor, while the external stress can produce negative H to compensate the external magnetic field. An experimental approach is used to investigate the strain hysteresis characteristic under varied drive levels and external stresses. The experiment results demonstrated that at a low drive level, a high external stress would reduce the hysteresis characteristic of B vs k curve. Meanwhile, we find a segment of B vs k curve almost without strain hysteresis under a low drive level and a high external stress. However, as increasing of the external stress, the curve will not be as smooth as that for lower external stress. Based on the Jiles-Atherton mean field and domain theory, the phenomenon is analyzed. In the view of Gibbs free energy and Theory of Jiles-Atherton magnetomechanical effect combined phenomenological technique we get a simpler model which is a quartic equation between strain k and magnetic induction B. It will direct the design and optimization of GMT in the future.