摘要
对电流变弹性体(electrorheological elastomers,EREs)的动态粘弹性及本构模型进行研究。以硅橡胶为基体,TiO2/尿素核壳颗粒为功能分散相,在1kV/mm取向电场条件下固化,制备颗粒体积含量为30%的各同异性ERE。在不同电场强度、剪切频率、应变幅值下测试ERE的应力-应变滞回曲线,并分析各工况下ERE的动态粘弹性,得到电场强度、应变幅值、剪切频率等因素对ERE动态粘弹性的影响规律。在实验基础上,建立了基于修正Bouc-Wen模型的ERE非线性本构模型,并识别出模型参数。结果表明,该本构模型模拟结果与试验数据吻合较好,说明该模型能够准确表征材料的动态粘弹性和非线性特征。
The viscoelastic properties and the modeling of electrorheological elastomers（EREs）under harmonic loadings were presented in this paper.With a 30% volume fraction of TiO2/urea core-shell particles dispersed in silicone rubber matrix,the anisotropic ERE samples were fabricated by curing under a constant electric field of1 kV/mm.The samples were tested under different levels of electric field with variable shear frequencies and strain amplitudes.Then the influences of loading conditions to viscoelastic properties of ERE were analyzed.After that a revised non-linear Bouc-Wen model was used to portray the behaviors of ERE and the parameters in this model were identified based on the experimental data.The simulations agreed well with the test data,indicating that the revised Bouc-Wen model can effectively reproduce the viscoelastic properties and nonlinearity of EREs.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第1期1090-1096,共7页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51478088)
国家重点基础研究发展计划(973计划)资助项目(2016YFC0701102)
