Magnetorheological (MR) elastomers have characteristics that their modulus can be controlled by an external magnetic field. Therefore, MR elastomers have potential applications in variable stiffness based devices, such as adaptive tuned vibration dynamic absorbers. For such devices, the tuning range depends much on MR effect. So it is important to fabricate MR elastomers with high MR effects. However, existing MR elastomers have relatively small MR effect, which is generally less than 100%. This paper aims to fabricate new MR elastomers with larger MR effect. To this end, four categories of MR elastomers with different components are fabricated and their performances were characterized by using a test rig and also verified by simulation analysis. The MRE samples used five components: two types of silicon rubber, a silicon oil, a curing agent and two types of iron particles with particle sizes of 5μm and 100μm. Experimental results indicated that two samples have MR effects as high as 212% and 246%, respectively.
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