Original Research ARTICLE
Dynamic Mechanical Hysteresis of Magnetorheological Elastomers subjected to the Cyclic Loading and Periodic Magnetic Field
- 1China Academy of Engineering Physics, China
- 2Centre of MicroNano Manufacturing Technology, School of Precision Instruments and Optoelectronics Engineering, Tianjin University, China
- 3Key Lab of Optoelectronic Technology and Systems, Ministry of Education, Chongqing University, China
- 4College of Opto-electronic engineering, Chongqing University, China
Magnetorheological elastomer (MRE) is a kind of the most promising smart materials with excellent magnetic-control mechanical properties. This work focuses on the study of the dynamic mechanical properties of MRE under cyclic loadings and periodic magnetic field. The influences of matrix, particle distribution, magnetic field on the dynamic mechanical hysteresis were systematically investigated. It was found that all the normal force, magnetic fields and shear strain would cause a hysteresis in the dynamic mechanical responses of MRE. The continuous cycle tests revealed the hysteresis tended to be saturated after several initial cycles. The hysteresis of MRE under the constant magnetic field can be attributed to the rearrangement of particles, which caused a hardening effect of MRE under the continuous dynamic tests. The periodic magnetic field caused a hysteresis in the dynamic modulus which could be attributed to the irreversible movement of the particles. Among them, the polymer matrix of MRE played an important role in the dynamic mechanical hysteresis, which suggested more stable molecular chain structures in the matrix would reduce the magnitude of hysteresis and improve its stability. Besides, the saturation of the mechanical hysteresis had also been studied, and then relevant physical mechanism was proposed for the qualitative explanation.
Keywords: magnetorheological elastomers, cyclic loading, Periodic magnetic field, Mechanical hysteresis, viscoelasticity
Received: 22 Aug 2019;
Accepted: 01 Nov 2019.
Copyright: © 2019 Zhang, Fang, Huang, Chen, Qi and Yu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Prof. Fengzhou Fang, Centre of MicroNano Manufacturing Technology, School of Precision Instruments and Optoelectronics Engineering, Tianjin University, tianjing, 300072, China, firstname.lastname@example.org
Prof. Miao Yu, Chongqing University, College of Opto-electronic engineering, Chongqing, 400044, China, email@example.com