Magneto-piezoresistance in Magnetorheological elastomers for magnetic induction gradient or position sensors
作者： Giovanni Ausanio , Vincenzo Iannotti , Enrico Ricciardi , Luca Lanotte , Luciano Lanotte
DOI: 10.1016/J.SNA.2013.10.009
关键词: Sensitivity (control systems) 、 Electromagnetic induction 、 Electrical resistance and conductance 、 Position sensor 、 Magneto 、 Percolation threshold 、 Magnetorheological fluid 、 Record value 、 Forensic engineering 、 Mechanics 、 Materials science
摘要: Abstract Composite material constituted by Fe micro-particles homogeneously dispersed in a silicone matrix, at volume concentration slightly above the percolation threshold but separated thin layer, was produced. The particle magnetic softness and their average size, have been properly improved with respect to previous investigations order maximize piezo-resistive piezo-magnetic effects. optimal combination of magneto-elasticity piezo-resistivity enables achieve record value magneto-piezo-resistivity sensitivity. An analytical model is proposed simulate theoretically expected behavior electric resistance vs. applied induction field gradient, so predict magneto-piezoresistive response explain obtained tailoring. experimental results good agreement predicted behaviors, validating employed interpretation phenomenon. A simple basic application position sensing also reported. presented this paper has demonstrated its potentiality project further improvements, while allow for different innovative applications.
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