A novel approach to investigate effect of magnetic field on dynamic properties of natural rubber based isotropic thick magnetorheological elastomers in shear mode

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• 作者：Sriharsha Hegde ; Katari Kiran ; K. V. Gangadharan
• 关键词：magnetorheological elastomer ; natural rubber ; carbonyl iron powder (CIP) ; dynamic analysis
• 刊名：Journal of Central South University of Technology
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：22
• 期：7
• 页码：2612-2619
• 全文大小：3,083 KB
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• 作者单位：Sriharsha Hegde (1)
  Katari Kiran (1)
  K. V. Gangadharan (1)
  
  1. Department of Mechanical Engineering, National Institute of Technology, Surathkal, Mangalore, 575025, India
  
• 刊物类别：Engineering
• 刊物主题：Engineering, general
  Metallic Materials
  Chinese Library of Science
  
• 出版者：Central South University, co-published with Springer
• ISSN：2227-5223

文摘

The preparation of natural rubber based isotropic thick magnetorheological elastomers (MRE) was focused on by varying the percentage volume concentration of carbonyl iron powder and developing a test set up to test the dynamic properties. Effect of magnetic field on the damping ratio was studied on the amplification region of the transmissibility curve. The viscoelastic dynamic damping nature of the elastomer was also studied by analyzing the force-displacement hysteresis graphs. The results show that MR effect increases with the increase in magnetic field as well as carbonyl iron powder particle concentration. It is observed that softer matrix material produces more MR effect. A maximum of 125% improvement in the loss factor is observed for the MRE with 25% carbonyl iron volume concentration. FEMM simulation shows that as carbonyl iron particle distribution becomes denser, MR effect is improved. FEMM analysis also reveals that if the distance between the adjacent iron particles are reduced from 20 μm to 10 μm, a 40% increase in stored energy is observed.