[1]孙春丽,徐赵东,戴军.混合包覆铁磁颗粒基磁流变液的测试及力学模型[J].东南大学学报(自然科学版),2019,49(2):328-333.[doi:10.3969/j.issn.1001-0505.2019.02.018]
 Sun Chunli,Xu Zhaodong,Dai Jun.Test and mechanical model of MR fluids based on magnetic particles coated by mixed materials[J].Journal of Southeast University (Natural Science Edition),2019,49(2):328-333.[doi:10.3969/j.issn.1001-0505.2019.02.018]
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混合包覆铁磁颗粒基磁流变液的测试及力学模型()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
49
期数:
2019年第2期
页码:
328-333
栏目:
材料科学与工程
出版日期:
2019-03-20

文章信息/Info

Title:
Test and mechanical model of MR fluids based on magnetic particles coated by mixed materials
作者:
孙春丽徐赵东戴军
东南大学土木工程学院, 南京210096
Author(s):
Sun Chunli Xu Zhaodong Dai Jun
School of Civil Engineering, Southeast University, Nanjing 210096, China
关键词:
混合包覆 磁流变液 沉降稳定性 力学模型
Keywords:
mixed coating magnetorheological fluids sedimentation stability mechanical model
分类号:
TU599
DOI:
10.3969/j.issn.1001-0505.2019.02.018
摘要:
为了提高磁流变液的抗沉降性能,分别制备了以多壁碳纳米管、氧化石墨烯以及表面活性剂作为包覆材料的3种轻质包覆铁磁颗粒.采用控制变量法混合3种铁磁颗粒,制得磁流变液样品,并进行沉降稳定性测试和剪切屈服应力测试,继而提出了一种能反映磁感应强度、体积分数、颗粒直径等对磁流变液剪切屈服应力影响的参数化力学模型.试验结果表明,混合轻质包覆铁磁颗粒的加入能极大提高磁流变液的沉降稳定性,且随着体积分数的增加,磁流变液的沉降率逐渐降低,当体积分数达到48%时,沉降率仅为3.49%.参数化力学模型结果与试验结果拟合度较高,证实了参数化力学模型的有效性,可为磁流变液微观力学模型的建立提供较好的指导.
Abstract:
To improve the sedimentation stability of magnetorheological(MR)fluids, three kinds of lightweight coated particles coated by multi-walled carbon nanotubes, graphene oxide and surfactant were prepared, respectively. The MR fluids were prepared by mixing the three magnetic particles through the variable-controlling approach. The sedimentation stability test and the shear yield stress test were carried out. A parametric mechanical model was proposed to reflect the influence of the magnetic induction, the volume fraction, the particle diameter on the shear yield stress of the MR fluids. The experimental results show that the addition of the magnetic particles coated with mixed lightweight materials can improve the sedimentation stability of the MR fluids. With the increase of the volume fraction of the magnetic particles, the sedimentation rate of the MR fluid decreases. The sedimentation rate reaches 3.49% when the volume fraction is 48%. The results of the proposed parametric mechanical model agree well with the tested data, confirming the validity of the parametric mechanical model. It is of great significance for the establishment of the mechanical model of MR fluid.

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备注/Memo

备注/Memo:
收稿日期: 2018-09-03.
作者简介: 孙春丽(1994—),女,硕士生;徐赵东(联系人),男,博士,教授,博士生导师,zhdxu@163.com.
基金项目: 国家杰出青年科学基金资助项目(51625803)、长江学者奖励计划资助项目、国家“万人计划”科技创新领军人才资助项目、江苏省特聘教授资助项目.
引用本文: 孙春丽,徐赵东,戴军.混合包覆铁磁颗粒基磁流变液的测试及力学模型[J].东南大学学报(自然科学版),2019,49(2):328-333. DOI:10.3969/j.issn.1001-0505.2019.02.018.
更新日期/Last Update: 2019-03-20