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

Table 7

MR effect of MRE with carbon black and naphthenic oil (0.5hz).

Sample		C20N20	C40N20	C20N40	C40N40	C60N40
Magnetic flux density (T)		0 / 0.94	0 / 0.94	0 / 0.94	0 / 0.94	0 / 0.94
Strain (%)	25
	Shear modulus (MPa)	0.80 / 1.45	0.76 / 1.32	0.66 / 1.08	0.69 / 1.13	0.67 / 1.53
	MR effect (%)	80.2	72.5	64.0	64.3	127.4
	50
	Shear modulus (MPa)	0.58 / 1.00	0.58 / 0.97	0.45 / 0.72	0.47 / 0.79	0.52 / 1.07
	MR effect (%)	73.1	67.9	58.2	67.9	106.9
	75
	Shear modulus (MPa)	0.49 / 0.75	0.50 / 0.76	0.39 / 0.57	0.39 / 0.60	0.45 / 0.78
	MR effect (%)	53.3	52.2	47.5	54.2	71.2
	100
	Shear modulus (MPa)	0.42 / 0.56	0.47 / 0.60	0.35 / 0.44	0.38 / 0.48	0.45 / 0.60
	MR effect (%)	33.2	26.9	27.1	26.6	33.5