各向同性磁流变弹性体性能测试及研究  

Performance Testing and Analysis of Isotropic Magnetorheological Elastomer

作　　者：尧子健 胡国良 喻理梵 朱文才 Yao Zijian;Hu Guoiang;Yu Lifan;Zhu Wencai(School of Mechatronics and Vehicle Engineering,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学机电与车辆工程学院,江西南昌330013

出　　处：《华东交通大学学报》2025年第1期97-104,共8页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(52165004);江西省国际科技合作重点项目(20232BBH80010);江西省自然科学基金项目(20242BAB25260)。

摘　　要：为了得到磁流变弹性体(MRE)随外加磁感应强度和激励频率的性能变化趋势,制备不同配比的MRE进行相对磁流变效应和剪切模量性能研究。以硅橡胶硅油质量分数之比为3∶2为制备基础,选用高黏度的硅油,制备3种MRE样品,分析在振荡剪切模式下,不同配比、不同剪切应变和剪切频率下MRE的储能模量和剪切模量随磁感应强度的变化以及在不同预压力下MRE法向力的变化趋势。实验结果表明,MRE的储能模量、剪切模量和法向力会随着磁感应强度的增大而增大。测试结果表明,当预压力由5 N增大到25 N时,MRE法向力最大变化量增大了31.6%。当磁感应强度从0增大到0.8 T时,样品3的最大储能模量为2.25 MPa,相对磁流变效应最大可达1 465.60%,样品3剪切模量最大为2.25 MPa,相较于零场情况增大了1 400.00%。实验表明,MRE适用于高频率、低剪切应变的工作场合,80%含量的铁粉能有效提高MRE的力学性能。In order to obtain the trend of the properties of magnetorheological elastomer(MRE)with the applied magnetic flux density and excitation frequency,MREs with different ratios were prepared to investigate the rela-tive MR effects and shear modulus properties.Three kinds of MRE samples were prepared based on the silicone rubber and silicone oil mass fraction ratio of 3∶2,and high viscosity silicone oil was selected to analyze the changes of energy storage modulus and shear modulus with magnetic flux density under oscillatory shear mode with different ratios,different shear strains,and shear frequencies,as well as the trends of MRE normal force un-der different preloads.The experimental results show that the energy storage modulus,shear modulus and nor-mal force of MRE increase with the increase of magnetic flux density.The results indicate that the maximum change of the MRE normal force increases by 31.6%when the preload is increased from 5 N to 25 N.When the magnetic flux density increases from 0 to 0.8 T,the maximum energy storage modulus of sample 3 is 2.25 MPa,with a maximum relative MRE effect of 1465.60%,and the maximum shear modulus of sample 3 is 2.25 MPa,which is an increase of 1400.00%compared to the zero-field case.This experiment shows that MRE is suitable for high-frequency and low-shear strain application,and iron powder with 80%mass fraction can effectively im-prove the mechanical properties of MRE.

关 键 词：磁流变弹性体 储能模量 剪切模量 磁流变效应 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]