Abstract
The methodology to realize the tunable one-way transmission of Lamb waves is proposed by using giant magnetostrictive materials. The elasticity of Terfenol-D is sensitive to the external magnetic fields, based on which the one-way transmission anti-symmetric and symmetric Lamb waves is achieved via non-symmetric magnetic field distributions imposed on Terfenol-D, and exemplified by numerical simulations in the frequency domain. Finally, the frequency tunability under magnetic fields is revealed quantitatively. The design scheme proposed is easily fabricated and artificially controllable, which opens a new prospect for the wave rectification and engineering applications.
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