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Full-Text Articles in Engineering
A Novel Dynamic Absorber Using Enhanced Magnetorheological Elastomers For Powertrain Vibration Control, Nong Zhang, Nga Hoang, Haiping Du
A Novel Dynamic Absorber Using Enhanced Magnetorheological Elastomers For Powertrain Vibration Control, Nong Zhang, Nga Hoang, Haiping Du
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents a novel Adaptive Tuned Vibration Absorber (ATVA) using the enhanced magnetorheological elastomers (MREs) for powertrain vibration reduction. The MRE material used in this application includes micro-sized iron particles enhanced by adding nano-sized magnetic powders. With the enhancement, MRE's elastic modulus significantly increases due to the MR effect. In the new ATVA, the MRE plays a role as a torsional spring whose stiffness coefficient can be varied with an external magnetic field. Additionally, this ATVA could operate in shear-squeeze mode rather than shear mode. Thus, the frequency range is much wider than that of general MREs. Such property …
Study On A Magnetorheological Fluid Bladder Spring For Isolation System, Xianzhou Zhang, Weihua Li, Xingyu Wang
Study On A Magnetorheological Fluid Bladder Spring For Isolation System, Xianzhou Zhang, Weihua Li, Xingyu Wang
Faculty of Engineering - Papers (Archive)
Vibration reduction and isolation plays an important role in protecting machinery and structures from unwanted vibration related problems. A variety of passive and active isolation systems have been developed for vibration suppression. However, passive systems are only effective for narrow frequencies while passive systems usually have high costs.
The Effect Of Friction On Magnetorheological Fluids, W H. Li, X Z. Zhang
The Effect Of Friction On Magnetorheological Fluids, W H. Li, X Z. Zhang
Faculty of Engineering - Papers (Archive)
This paper presents an experimental approach to study the effect of friction on magnerorheological (MR) fluids. Both steady and dynamic modes were employed to investigate MR fluid behaviors. The experimental results indicate that the total MR effects are dominated by two factors: magnetic force and friction force. Conventionally, the magnetic force contribution to MR effect has been intensively studied while the friction force effect has attracted less attention. This study provides a method to quantitatively predict the friction contribution to the total MR effect. It may be used to effectively analyze enhanced MR effects reported by other groups. Also, it …
Damping Of Magnetorheological Elastomers, Lin Chen, Xinglong Gong, Weihua Li
Damping Of Magnetorheological Elastomers, Lin Chen, Xinglong Gong, Weihua Li
Faculty of Engineering - Papers (Archive)
The damping property of magnetorheological (MR) elastomers is characterized by a modi¯ed dynamic mechanical-magnetic coupled analyzer. The in°uences of the external magnetic °ux density, damping of the matrix, content of iron particles, dynamic strain, and driving frequency on the damping properties of MR elastomers were investigated experimentally. The experimental results indicate that the damping properties of MR elastomers greatly depend on the interfacial slipping between the inner particles and the matrix. Di®erent from general composite materials, the interfacial slipping in MR elastomers is a®ected by the external applied magnetic field.
An Effective Permeability Model To Predict Field-Dependent Modulus Of Magnetorheological Elastomers, X. Z. Zhang, W.H. Liu, Kosasih, X.C. Zhang, X.L Gong, Q.P. Zhang
An Effective Permeability Model To Predict Field-Dependent Modulus Of Magnetorheological Elastomers, X. Z. Zhang, W.H. Liu, Kosasih, X.C. Zhang, X.L Gong, Q.P. Zhang
Faculty of Engineering - Papers (Archive)
Magnetorheological elastomers (MREs) are composites where magnetic particles are suspended in a non-magnetic solid or a gel-like matrix. MREs are shown to have a controllable, field-dependent shear modulus. Most of conventional MREs models are based on magnetic dipole interactions between two adjacent particles of the chain. These models can predict the field-dependent properties of MREs with simple chain-like structures. In this paper, an effective permeability model is proposed to predict the field-induced modulus of MREs. Based on the effective permeability rule and taking into account the particle’s saturation, the model is proposed to predict the mechanical performances of MREs with …