Frequency-independent viscoelasticity of carbonyl iron particle suspensions under a magnetic field. (6th April 2017)

• Record Type: Journal Article
• Authors: Shan, Lei; Jia, Wenpeng; Zhou, Ming; Meng, Yonggang; Zhang, Xiangjun; Tian, Yu
• Is Part Of: Smart materials and structures. Volume 26:Number 5(2017:May)
• Publication Date: 2017-04-06
• Subjects: magnetorheological fluid -- viscoelasticity -- frequency-independent -- friction and lubrication; 83.80.Gv -- 83.60.Bc -- 83.80.Hj -- 47.57.J-; Smart materials -- Periodicals; Strucural design -- Periodicals; 620.11
• DOI: 10.1088/1361-665X/26/5/054009
• Languages: English
• ISSNs: 0964-1726

Abstract

Abstract: The linear dynamic viscoelastic properties of carbonyl iron particle suspensions under external magnetic fields were studied. Results revealed a frequency-independent viscoelasticity under a certain critical magnetic field. The characteristic magnetic field intensity decreased as the increase of particle volume fraction of the suspension, corresponding to a similar value of characteristic loss tangent. By considering the competitions among hydrodynamic, friction and magnetic forces of particles under different magnetic fields, a theoretical linear viscoelastic model was proposed to describe and analyze the tested frequency dependence of viscoelasticity of the suspensions. The model could also be applied to polymer gels with similar viscoelastic behaviors and inspire the design of novel broad frequency vibration damping materials with frequency-independent viscoelasticity.