Abstract
As a kind of smart material, magnetorheological elastomer (MRE) is composed of magnetizable particles dispersed in an elastomer matrix. Because adjusting an external magnetic field can continuously, rapidly and reversibly control the dynamic properties, there has been increasing research on MRE for mitigation of unwanted vibrations. In this paper, the dynamic mechanical analysis tests were performed to investigate the influence of strain, frequency and magnetic field on the controllable dynamic properties. The storage modulus and loss modulus of MRE were analyzed with frequencies from 1 to 50 Hz, strain amplitudes from 1 to 6% and magnetic field intensities from 0 to 500 mT. The results show that the storage modulus decreases with increasing strain amplitude, increases with frequency and magnetic strength, and remains constant when the magnetic saturation occurs. Furthermore, the dependence of loss modulus on frequency lies on the matrix material of MRE. Based on the experimental results, a fractional derivative model was developed to describe the viscoelastic properties and the controllable dynamic properties. The comprehensive study of mechanical property characterisation is a guarantee for constitutive models to accurately describe the dynamic behaviour of MRE, which is an essential step towards the application for vibration control.
Highlights
Introductionmagnetorheological elastomer (MRE) consists of magnetisable particles and non-magnetic matrix
As a composite material, magnetorheological elastomer (MRE) consists of magnetisable particles and non-magnetic matrix
MRE can be classified into two types [1]: anisotropic MRE which have a directed particle orientation attributed to the application of magnetic field during the solidification, and isotropic MRE which can be characterized by a random distribution of magnetic particles as the curing progress is without magnetic field
Summary
MRE consists of magnetisable particles and non-magnetic matrix. Due to the combination of the versatility of active control and the reliability of passive control, semi-active (adaptive-passive) vibration control devises have attracted considerable intention over the past decades, and increasing effort has been devoted to the possibility of incorporating smart materials into semi-active vibration control devices [5] Among these suited smart materials, MRE is distinctive due to the controllable rheological property by adjusting an external. The loss modulus M" indicates the ability of viscoelastic material to dissipate the energy of deformation. They can be defined as: 0(M sin t M cos t)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
