Despite the promising theoretical outcomes of spatiotemporally modulated phononic crystals and metamaterials in one-way isolation of elastic waves, limited success has been achieved in obtaining a feasible magnet-free realization of the concept for real-world applications. This work entails the design and operation of a vibration diode which exploits the inherent geometric-dependence of stiffness in non-axisymmetric cross sections. The diode relies on a phase shift between the geometric orientations of an array of resonators attached to a host beam to prescribe a spatial modulation of the metamaterial stiffness, accompanied with a uniform rotation induced via small motor action to effectively onset a spatiotemporal stiffness profile. The proposed configuration capitalizes on the simple design and versatility of locally resonant elastic metabeams (EMs) and can, therefore, be tailored to different application requirements without interfering with the primary functions and structural requirements of the main system. Both theoretical and numerical tools have been incorporated to prove the effectiveness of the proposed system in one-way isolation of mechanical vibrations. Preliminary results pertaining to the experimental setup of the diode are also outlined. The study aims to lay a forward path for micro/macro-scale implementation of linear vibration diodes.
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