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Dynamic behavior of sandwich beams with different compositions of magnetorheological fluid core

International Journal of Smart and Nano Materials 2021年第1期12卷 88-106页

作者： Subash Acharya Vipin J Allien Puneet N P Hemantha Kumar Department of Mechanical Engineering NITK SurathkalMangaloreKarnatakaIndia

Magnetorheological fluid(MRF)sandwich beams belong to a class of adaptive beams that consists of MRF sandwiched between two or more face layers and have a great prospective for use in semi-active control of beam vibrations due to their superior vibration suppression *** composition of MRF has a strong influence on the MRF properties and hence affects the vibration characteristics of the *** this work,six MRF samples(MRFs)composed of combination of two particle sizes and three weight fractions of carbonyl iron pow-der(CIP)were prepared and their viscoelastic properties were *** MRFs were used to fabricate different MRF core sandwich ***,a sandwich beam with commer-cially available MRF 132DG fluid as core was *** modal parameters of the cantilever MRF sandwich beams were determined at different magnetic ***,sinusoidal sweep excitation tests were performed on these beams at different magnetic fields to investigate their vibration suppres-sion *** having larger particle size and higher weight fraction of CIP resulted in higher damping ratio and vibration ***,optimal particle size and weight fraction of CIP were determined based on the maximization of damping ratio and minimization of weight of MRF.

关键词： Smart materials adaptive sandwich beam damping ratio vibration suppression complex shear modulus

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