A magnetic-dipoles-based micro–macro constitutive model for MRFs subjected to shear deformation
A magnetic-dipoles-based micro–macro constitutive model for MRFs subjected to shear deformation
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DOI：
10.1007/s00397-010-0468-3
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发表时间：
2010-06
期刊：
影响因子：
2.3
通讯作者：
C. Yi;Xianghe Peng;Chunwei Zhao
中科院分区：
文献类型：
--
作者：
C. Yi;Xianghe Peng;Chunwei Zhao
基于更精确的磁偶极模型和统计方法，建立了剪切变形下磁流变液本构行为的细观-宏观描述。传统的粘塑性宾汉模型和MRF的双粘度模型可以从所提出的模型作为特例。该模型可以考虑磁感应强度、颗粒尺寸、颗粒体积分数、剪切应变和剪切应变率、饱和磁化强度等因素对磁流变液屈服剪应力的影响。与实验结果的一致性证明了该模型的有效性。本文还研究了轻质涂料对悬浮颗粒沉降速度的影响。该模型可以综合评价磁流变液的整体性能和各主要影响因素的影响，为高性能磁流变液的初步设计和优化提供参考。
A micro–macro description for the constitutive behavior of magnetorheological fluids (MRFs) under shear deformation is formulated based on a more exact magnetic-dipolar model and a statistical approach. The conventional Bingham’s model of viscoplasticity and the dual-viscosity model for MRFs can be obtained from the proposed model as the special cases. This model can take into account the effect of each of the main influencing factors, such as the intensity of magnetic induction, the size, and the volume fraction of particles, shear strain and shear strain rate, saturated magnetization, on the yield shear stress of MRFs. The satisfactory agreement with the experimental results demonstrates the validity of the proposed model. The effect of light weight coating on the sedimentation velocity of the suspended particles is also investigated. This model can evaluate comprehensively the overall property of an MRF and the effects of different main influencing factors; therefore, it may also be of help for the initial design and optimization of high-performance MRFs.