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Advances in Materials Science and Engineering
Volume 2016 (2016), Article ID 7079698, 11 pages
http://dx.doi.org/10.1155/2016/7079698
Research Article

The Static and Dynamic Mechanical Properties of Magnetorheological Silly Putty

1Department of Engineering Mechanics, Hohai University, Nanjing 210098, China
2Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, China

Received 14 May 2016; Revised 22 June 2016; Accepted 26 June 2016

Academic Editor: Antônio G. de Lima

Copyright © 2016 Fei Guo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A novel magnetorheological material defined as magnetorheological Silly Putty (MRSP) is prepared by dispersing soft magnetic particles into Silly Putty matrix with shear stiffening property. Static mechanical properties including creep and stress relaxation and dynamic rheological properties of MRSPs are tested by rheometer. The experimental results indicate that the external magnetic field exerts significant influence on the creep and relaxation behaviors. Moreover, the storage modulus of MRSPs increases sharply in response to the external stimuli of increasing angular frequency automatically and can be enhanced by external magnetic field. Besides, temperature plays a key role in shear stiffening and magnetorheological effect of MRSPs. Furthermore, considering the obstruction to the particle chains formation induced by Silly Putty matrix, a nonperforative particle aggregated chains model is proposed. The model curve is in consistency with experimental data, which means it can describe magnetoinduced behavior of MRSPs well.