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original research article

Effect of Curing Current on Stiffness and Damping Properties of Magnetorheological Elastomers

Norhiwani Hapipi 1 , Saiful Amri Mazlan 1 , Siti Aishah Abdul Aziz 1 , Ubaidillah Ubaidillah 1 , 2 * , Norzilawati Mohamad 1 , Izyan Iryani Mohamad Yazid 1 , Seung-Bok Choi 1

1Engineering Materials Structure and Technology Research Laboratory, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, Malaysia

2Mechanical Engineering Department, Faculty of Engineering, Universitas Sebelas Maret, Indonesia

3National Center for Sustainable Transportation Technology, Indonesia

4Mechanical Engineering Department, Inha University, Korea

*Email: ubaidillah_ft@staff.uns.ac.id

In this study, the viscoelastic effects of the magnetic field strength imposed for curing process on the stiffness and damping properties of magnetorheological elastomers (MREs) are experimentally investigated. In order to observe the effect, three different samples of MRE are fabricated by imposing curing current of 0.1 A, 0.3 A and 0.5 A which is equivalent to the magnetic field of 70 mT, 309 mT, and 345 mT, respectively. All samples consist of 30% silicone rubber and 70% carbonyl iron particles (CIPs) by weight percentages. After observing the morphological images via SEM, the dynamic performances of these samples, such as storage modulus and loss factor are evaluated and compared as a function of the magnetic field intensity or oscillation frequency. It is shown that the sample cured at 0.5A exhibits the highest storage modulus in the frequency domain. In addition, MR effects of three samples are identified, and it is found that the sample cured at 0.5A shows the highest absolute and relative MR effect.

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