Fabrication and Characterization of Natural Rubber-Based Magnetorheological Elastomers at Large Strain for Base Isolators

Table 3

MR effect of MREs with various iron ratios (50% shear strain, 0.5Hz).

Iron volume fraction (%)	0	15	25	30	35
Magnetic flux density (T)	0 / 0.94	0 / 0.94	0 / 0.94	0 / 0.94	0 / 0.94
Isotropic
Shear modulus (MPa)	0.35 / 0.35	0.55 / 0.66	0.71 / 0.95	0.77 / 1.15	0.85 / 1.31
MR effect (%)	0	20.0	33.8	49.4	63.8
Anisotropic
Shear modulus (MPa)	-	0.53 / 0.68	0.73 / 0.93	0.78 / 1.14	0.82 / 1.24
MR effect (%)	-	28.3	27.4	46.2	51.2