Use of magnetorheological elastomer in an adaptive sandwich beam with conductive skins. Part II: Dynamic properties - Discussion

    Authors

    G. Y. Zhou;Q. Wang

    Comments

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    Abbreviated Journal Title

    Int. J. Solids Struct.

    Keywords

    sandwich beam; semi-active vibration control; magnetorheological; elastomer; TRANSVERSELY FLEXIBLE CORE; BEHAVIOR; DEFORMATION; Mechanics

    Abstract

    The second part of this research is to present the field-dependant dynamic property of a sandwich beam with conductive skins and a soft core composed of a magnetorheological elastomer (MRE) part and two non-MRE parts. The MRE part of the core is configured to operate in shear mode and hence the dynamic properties of the sandwich beam can be controlled by magnetic fields due to the field-dependant shear modulus of MRE material. According to the analytical solution for the magnetoelastic loads applied to conductive deformable bodies presented in the first part, the model of the proposed sandwich beam is developed via Hamilton principle. A simply supported MRE-based sandwich beam excited by a vertical force distributed uniformly in a narrow region around the center of the beam is simulated. The anti-resonant frequencies and the resonant frequencies are found to change with the applied magnetic field up to 30%. The procedure to seek the optimal length of MRE part is also presented. Although MRE is a soft material with shear modulus about 0.4 Mpa, this research indicates that the sandwich configuration can well utilize the controllable property of MRE to design applicable smart devices with controllable stiffness. (c) 2005 Published by Elsevier Ltd.

    Journal Title

    International Journal of Solids and Structures

    Volume

    43

    Issue/Number

    17

    Publication Date

    1-1-2006

    Document Type

    Editorial Material

    Language

    English

    First Page

    5403

    Last Page

    5420

    WOS Identifier

    WOS:000239613900023

    ISSN

    0020-7683

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