Magneto-Induced Normal Stress of Magnetorheological Gel Under Quasi-Statically Monotonic and Periodically Cyclic Loading

Magnetorheological (MR) gel, an analog of MR fluid, is a novel kind magnetic-responsive material. In this article, the influence quasi-statically monotonic loading and periodically cyclic on normal stress behavior gel (MRG) systemically investigated. Firstly, carbonyl iron powder (CIP) soft polymer were adopted for fabrication MRG. Then, variations with shear strain tested under different excited magnetic fields, rates, CIP contents, amplitudes. It was found that MRG exhibits three prominent stages: sudden rise at beginning, followed by rapid decrease, then final steady-state value. The experiments also indicated field, compared other influencing factors, has most critical effect corresponding mechanisms various phenomena methodically discussed. Furthermore, ratio to proposed better comprehend mechanism evolution internal microstructures effects from perspective. results implied close relation field content increase helpful high-efficiency effect.