Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11016273 | Composites Part B: Engineering | 2019 | 27 Pages |
Abstract
Magnetorheological elastomers (MREs) are novel class of magneto-active materials comprised of micron-sized ferromagnetic particles impregnated into an elastomeric matrix, which exhibit variable stiffness and damping properties in a reversible manner under the application of an external magnetic field. Characterization of highly complex behavior of these active composites is a fundamental necessity to design adaptive devices based on the MREs. This study is mainly concerned with in-depth experimental characterizations of static and dynamic properties of different types of MREs using methods defined in related standards. For this purpose, six different types of MRE samples with varying contents of rubber matrix and ferromagnetic particles were fabricated. The static characteristics of the samples were experimentally evaluated in shear mode as a function of the magnetic flux density. The particular MRE sample with highest iron particles content (40% volume fraction) was chosen for subsequent dynamic characterizations under broad ranges shear strain amplitude (2.5-20%), excitation frequency (0.1-50â¯Hz) and applied magnetic flux densities (0-450â¯mT). The results revealed nearly 1672% increase in the MRE storage modulus under the application of a magnetic flux of 450â¯mT, which confirms the potential of the novel fabricated MRE for control of vibration and noise in various engineering applications.
Related Topics
Physical Sciences and Engineering
Engineering
Engineering (General)
Authors
Ashkan Dargahi, Ramin Sedaghati, Subhash Rakheja,