Development of a Performance-Enhanced Hybrid Magnetorheological Elastomer-Fluid for Semi-Active Vibration Isolation: Static and Dynamic Experimental Characterization

Materials

Rahizar Bin Ramli¹  Sabariah Julai¹  Ayman M. H. Salem¹  Asan G. A. Muthalif²  Abdelrahman Ali² 

[1] Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;Department of Mechanical and Industrial Engineering, College of Engineering, Qatar University, Doha P.O. Box 2713, Qatar;

关键词: hybrid materials;    magnetorheological elastomers;    magnetorheological fluids;    vibration isolation;    transmissibility factor;   

DOI  :  10.3390/ma15093238

来源: DOAJ

【 摘 要 】

Magnetorheological elastomers (MREs) are a class of emerging smart materials in which their mechanical and rheological properties can be immediately and reversibly altered upon the application of a magnetic field. The change in the MRE properties under the magnetic field is widely known as the magnetorheological (MR) effect. Despite their inherent viscoelastic property-change characteristics, there are disadvantages incorporated with MREs, such as slow response time and the suspension of the magnetic particles in the elastomer matrix, which depress their MR effect. This study investigates the feasibility of a hybrid magnetorheological elastomer-fluid (MRE-F) for longitudinal vibration isolation. The hybrid MRE-F is fabricated by encapsulating MR fluid inside the elastomer matrix. The inclusion of the MR fluid can enhance the MR effect of the elastomer by providing a better response to the magnetic field and, hence, can improve the vibration isolation capabilities. For this purpose, an MRE-based coupling is developed, and isolation performance is investigated in terms of the linear transmissibility factor. The performance of the hybrid MRE-F was compared against two different MRE samples. The results show that further enhancement of MR-effect in MREs is possible by including MR fluid inside the elastomer. The hybrid MRE-F exhibited better stiffness change with the current increase and recorded the highest value of $55.911 \mathrm{N}/\mathrm{mm}$. The transmissivity curves revealed that the MRE-F contributed to a broader shift in the natural frequency with a $7.2 \mathrm{Hz}$ overall shift at $8.9 \mathrm{mT}$. The damping characteristics are higher in MRE-F, recording the highest percentage increase in damping with $33.04\%$. Overall, the results reveal the promising potential of hybrid MRE-F in developing MRE-based coupling for longitudinal vibration isolation.

【 授权许可】

Unknown