• 更多栏目
    • 语种

    欧进萍

    • 教授     博士生导师   硕士生导师
    • 性别:男
    • 毕业院校:哈尔滨建筑大学
    • 学位:博士
    • 所在单位:建设工程学院
    • 电子邮箱:ojinping@dlut.edu.cn

    访问量:

    开通时间:..

    最后更新时间:..

    Magnetostrictive effect of magnetorheological elastomer

    点击次数:

    论文类型:期刊论文

    发表时间:2008-02-01

    发表刊物:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

    收录刊物:SCIE、EI

    卷号:320

    期号:3-4

    页面范围:158-163

    ISSN号:0304-8853

    关键字:magnetorheological elastomer; carbonyl iron particle; silicone rubber; composite; magnetostriction

    摘要:Magnetorheological elastomer (MRE) has been known for its magnetic field-dependent stiffness, but only a few works study its magnetostrictive property. The aim of this paper is to present results of studies on magnetostriction of the MRE consisting of carbonyl iron particles displaced in the matrix made of a silicone rubber. The MRE samples were placed in the magnetic field that varied from 0 to 636 kA/ m, which was produced by the PEM-1022LS magnetic system. The longitudinal magnetostriction of the samples was measured by strain gauge. Three different tests were performed: ( 1) increased and decreased magnetic fields on four different volume fraction MREs with particles randomly dispersed, namely, 0%, 15%, 20% and 27%, ( 2) increased and decreased magnetic fields on three different MREs, with the same volume fraction of particles but varied orientation, namely, randomly, vertically and parallelly; ( 3) increased and decreased magnetic field three times continuously on the MRE with particles randomly oriented. Results indicated that ( 1) magnetostrictive effect increases with increase in volume fraction of particles and magnetostriction generally increases with increasing magnetic field, ( 2) orientation of particles influences the magnetostrictive performance significantly, ( 3) with increase of times of tests, saturation strain decayed and some remnant magnetostriction existed after switching off the magnetic field in each cycle. The mechanism of magnetostrictive effect of the composite was proposed to explain the phenomenon. (C) 2007 Published by Elsevier B.V.