Open AccessFrequency and Amplitude Dependence of Magnetorheological Elastomers Composites
Author(s) -
Nordalila Moksin,
Raa Khimi Shuib,
Hanafi Ismail,
Mohamad Kamal Harun
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/548/1/012006
Subject(s) - materials science , composite material , magnetorheological elastomer , elastomer , zinc ferrite , magnetorheological fluid , isotropy , ferrite (magnet) , anisotropy , natural rubber , carbonyl iron , rheometer , amplitude , zinc , magnetic field , rheology , metallurgy , optics , physics , quantum mechanics
In this study, anisotropic and isotropic magnetorheological elastomers (MREs) based on nickel zinc ferrite and natural rubber were prepared. The amount of nickel zinc ferrite was varied at five different levels (20, 40, 60, 80, and 100 phr) to assess its optimum content for enhancing dynamic mechanical performance of MREs. Tan δ was measured through parallel plate rheometer over frequency range of 0.1-100 Hz and strain amplitude range of 0.1-6%. The results revealed that tan δ increased with increasing waste nickel zinc ferrite content and reached maximum value at 100 phr for both isotropic and anisotropic MREs. SEM micrograph showed that anisotropic MREs had chain-like columnar structures of magnetic particles in the matrix as a consequence of an applied magnetic field during curing. For frequency sweep test, tan δ for anisotropic MRE improved 244% and for strain amplitude test 159% improvement compared to isotropic MRE.