Study of PDMS based magnetorheological elastomers

Abstract

The fabrication of conventional magnetorheological elastomers (MRE) is usually taken more than 1 day because the conventional matrixes such as natural rubber and silicone rubber need long curing time to become solid state. This study presents a rapid method for fabricating MRE within 90 minutes by using poly(dimethylsiloxane) (PDMS) as the matrix thanks to the rapid curing of PDMS in high temperature. A total of four PDMS based MRE samples were fabricated. Their mechanical and rheological properties under both steady-state and dynamic loading conditions were tested with a parallel-plate rheometer. Additionally, the microstructures of the PDMS based MREs were also observed by SEM and compared with the silicone rubber based MRE.

Matrix dependence of the linear viscoelastic region in magnetorheological elastomers

“…The limit is determined at the point where the G# and G$ become dependent on the strain. Tian et al (2013) analysed the LVE region of isotropic MREs, for which they used stress-strain curves and also storage modulus-strain curves. They conclude that particle content decreases the LVE region of the MRE materials.…”

“…The LVE region of MRE isotropic samples is reduced with the increment of the external magnetic field (Tian et al, 2013). To determine the LVE region, Gordaninejad et al (2012) defined a linear elastic deformation at 1% of strain, because at high strains, MRE has a non-linear behaviour due to the non-linear behaviour of the compression and shear modulus.…”

Experimental Investigation of an Adaptively Tuned Dynamic Absorber Incorporating Magnetorheological Elastomer with Self-Sensing Property

“…A number of studies have been reported on the fundamental features of MREs [6][7][8]. These research studies share common findings whereby the baseline stiffness of the composite was kept low, and the amount of the magnetic filler particles was near the critical concentration, even for the largest changes of the material properties.…”

Rheological and damping characteristics of adaptive materials for layered structures

“…Typically, such materials are based on the use of a high-viscosity or rubber-like matrix into which particles, for example, iron, orienting along the magnetic field vector are introduced [3,4]. Performed experimental studies [5][6][7][8] show that almost all magnetically controlled materials exhibit a strong nonlinearity of their rheological properties as functions of magnetic field induction.…”