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Indexed by:期刊论文

Date of Publication:2012-07-01

Journal:SMART MATERIALS AND STRUCTURES

Included Journals:SCIE、EI、Scopus

Volume:21

Issue:7

ISSN No.: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.