Field Dependence of Viscoelastic Properties of MR Elastomers

Abstract

A magnetoactive elastomer made of micronic carbonyl iron particles, structured in elongated clusters and embedded in a silicon elastomer matrix is studied under traction both in static and dynamic modes. The application of a magnetic field of 120 kA/m induces a change in elastic moduli of about 0.6 MPa at strains of 4 to 5%. Still higher changes (4 MPa) are observed in dynamic storage modulus at low strains (10-4 to 10-3). The shape of the stress-strain curves are explained by taking into account the existence of a fiber like structure.

Fatigue life prediction of magnetorheological elastomers subjected to dynamic equi-biaxial cyclic loading

“…Currently, most research into MREs has been concerned with the MR effect which is usually characterised by shear modulus [9,10], stiffness [11] and damping capability [12]. The mechanical properties of MREs, including modulus and damping capability, have a very large bearing on whether components manufactured from them will find wide practical applications.…”

Development of a force sensor working with MR elastomers

“…Besides, other rubbers, such as nature rubbers, synthetic rubber, silicone rubber or some polyurethane were also used to fabricate MREs. [8][9][10][11].…”

Damping of magnetorheological elastomers

“…MR elastomers have attracted increasing attention and ob-tained broad application prospects recently. Bellan et al studied the shear stress-strain relationship under applied magnetic fields [16], Ginder et al investigated the magnetostriction performance [17], and Bossis et al researched the conductivity and optical properties [18]. Ginder [19], Lerner [20] and Deng et al [21] developed adaptive tuned vibration absorbers based on MR elastomers.…”