Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2012-07-01

Journal: SMART MATERIALS AND STRUCTURES

Included Journals: Scopus、EI、SCIE

Volume: 21

Issue: 7

ISSN: 0964-1726

Abstract: The mechanism for the influence of the normal pressure on the magnetic-induced shear modulus of magnetorheological elastomers (MREs) was analyzed. Pre-structured MRE samples with 30% micro-sized (similar to 4 mu m) carbonyl iron particles by volume fraction and silicon rubber were prepared under a constant magnetic field of 200 kA m(-1). A parallel-plate MR rheometer was used to conduct dynamic measurements. Under constant strain amplitude (1%) and frequency (10 Hz), different normal pressures (32-128 kPa) were applied on the samples to investigate the normal pressure-dependence properties of MREs. The results indicated that as the normal pressure increases, the magnetic-induced shear modulus of an MRE increases, while the relative MR effect decreases.