Release Time:2019-03-12  Hits:

Indexed by: Conference Paper

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.