摘要
磁流变弹性体在智能缓冲减振等技术领域具有广阔的应用前景。文中利用硅橡胶和羰基铁粉在预结构化条件下制备了各向异性的磁流变弹性体,设计了磁流变弹性体压缩性能测试励磁装置,并采用有限元方法对其磁场分布进行了仿真优化,使弹性体测试区间磁场强度水平方向均匀度小于0.1,竖直方向均匀度小于0.15。最后,在不同励磁电流条件下,采用不同压缩速率对安装在该励磁装置中的不同厚度的磁流变弹性体分别进行了压缩性能测试。结果表明,由于磁场耦合效应,随着厚度的增加,磁致压缩模量从0.08 MPa上升到0.44 MPa再下降到0.05 MPa,磁流变效应从3.98%上升到25.73%再下降到2.82%,呈现先增加后减小的趋势;随着励磁电流的增大,基体中磁性颗粒间相互作用能增大,使得磁流变弹性体的磁致压缩模量随着磁场强度的增强从0.11 MPa增加到0.44 MPa,且应变越大,磁致压缩模量的增幅越明显;磁流变弹性体的压缩模量随压缩速率的增大而增大,且应变和励磁电流越大,压缩速率对压缩模量增强效果越显著。
Magnetorheological elastomers have broad application prospects in intelligent cushioning and vibration reduction.In this paper,the anisotropic magnetorheological elastomers were made by using silicone rubber and carbonyl iron powder under pre-structured conditions,and an exciting device for testing the compression properties of the magnetorheological elastomer was designed.The magnetic field distribution was simulated and optimized by finite element method so that the horizontal uniformity and vertical uniformity of the magnetic field strength in the testing area of the elastomer were less than 0.1 and 0.15 respectively.Finally,the compression properties of different thicknesses of the magnetorheological elastomers were tested with different compression rates at different excitation currents.The experimental results show that,due to magnetic coupling effect,the magnetic compression modulus increases from 0.08 MPa to 0.44 MPa and then decreases from 0.05 MPa with the increase of thickness,and the magnetorheological effect increases from 3.98%to 25.73%and then decreases from 2.82%,showing a trend of first increasing and then decreasing.With the increase of excitation current,the interaction energy between the magnetic particles in the matrix increases,and the magnetocompression modulus of the magnetorheological elastomer increases from 0.11 MPa to 0.44 MPa with the increase of magnetic field intensity.The compression modulus of magnetorheological elastomer increases with the increase of compression rate,and the greater the strain and excitation current are,the more significant the compression rate for the enhancement of compression modulus is.
作者
白通
梁伟
钟舜聪
顾立勋
李劲林
Tong Bai;Wei Liang;Shuncong Zhong;Lixun Gu;Jinlin Li(School of Advanced Manufacturing,Fuzhou University,Quanzhou 362251,China;College of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;Fujian Provincial Key Laboratory of Terahertz Functional Devices and Intelligent Sensing,Fuzhou 350108,China)
出处
《高分子材料科学与工程》
CSCD
北大核心
2024年第11期87-95,共9页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(52205558)
福建省自然科学基金资助项目(2021J01564,2021J05116)。
关键词
磁流变弹性体
硅橡胶基
磁流变效应
压缩模量
magnetorheological elastomer
silicone rubber base
magnetorheological effect
compression modulus
作者简介
通讯联系人:梁伟,主要从事智能材料与传感技术研究,E-mail:liangwei@fzu.edu.cn。
