Experimental Investigation on the Field-Dependent Properties of Magnetorheological Elastomer with Circular Honeycomb Holes

Miao Yu,Xing Zheng,Seung-Bok Choi,Jie Fu,Zhiwei Xing

doi:10.3389/fmats.2014.00034

Abstract

In order to enhance adjustable mechanical properties of a specific magnetorheological elastomer (MRE), this study presents a new exterior structure of MRE by punching circular honeycomb holes on the MRE samples. Seven silicone rubber MRE samples with the same component are fabricated and then punched holes with different numbers and diameters. The influence of different porosities on the mechanical properties of MRE under various magnetic fields is experimentally investigated by using a rheometer with electromagnetic suite. It is shown from experimental investigation that the porosity of MRE samples has a significant impact on the performance of MRE; the shear storage modulus (MR effect) and the loss factor is greatly increased. It is also observed that all the field-induced mechanical properties of the samples attain their respective maximum performance when the porosity increases to a critical value. The experimental results presented in this work directly indicate that high performances of the field-dependent mechanical and rheological properties can be achieved by means of external alternative structures such as honeycomb holes.

Highlights

Magnetorheological elastomer (MRE) is a relatively new branch of magnetorheological (MR) material family, whose rheological, mechanical, and magnetic properties can be varied continuously, rapidly, and reversibly under applied magnetic field (Jolly et al, 1996; Gong et al, 2005)
The MR effects for the prepared samples reached a maximum of 300% when the porosity of MRE samples was 13.00% (Sample MRE-N13-D2)
It is obvious that MR effects www.frontiersin.org can be dramatically improved by punching circular honeycomb holes

Summary

Introduction

Magnetorheological elastomer (MRE) is a relatively new branch of magnetorheological (MR) material family, whose rheological, mechanical, and magnetic properties can be varied continuously, rapidly, and reversibly under applied magnetic field (Jolly et al, 1996; Gong et al, 2005). Zhang et al (2010) prepared a type of hybrid MRE, in which MRFs and magnetorheological gels (MRGs) were injected into the punched holes, to improve mechanical performance. In order to validate high performances of the proposed MRE, several MRE samples with different porosities are tested under shear mode in an increasing magnetic field.

Results

Conclusion