Life-Cycle Evaluation of Anisotropic Particle-Based Magnetorheological Fluid in MR Brake Performance
- PDF / 1,869,631 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 6 Downloads / 183 Views
CONDENSED MATTER
Life-Cycle Evaluation of Anisotropic Particle-Based Magnetorheological Fluid in MR Brake Performance Sachin R. Patel 1 & Ramesh V. Upadhyay 1
&
Dipal M. Patel 2
Received: 24 April 2020 / # Sociedade Brasileira de Física 2020
Abstract The work reports the life-cycle test of flake-shaped particle-based magnetorheological (MR) fluid using the MR brake system and evaluated the performance of brake. The choice of the application is based on the understanding that normal force in this case is zero and the same is not true for other applications. Thus, it will exhibit only shear-induced deformation/degradation of MR fluid properties. The test was performed under a constant magnetic field for 105 cycles at 300 rpm. The MR fluid collected after cyclic operation exhibits no change in surface morphology as well as MR properties. Thus, the torque transmission even after this cycle remains the same. This is not the same when commercially available spherical particle-based MR fluid is used. There is a decrement in the torque transmission of MR brake by ~ 30%. The results are discussed on the basis of MR effect and the change in surface morphology of particles. The results confirm that the use of flake-shaped-based MR fluid gives better performance when used for long-term application. Keywords Magnetorheological fluids . MR brake . Life-cycle . Rheology . Flake-shaped particles
1 Introduction Spherical carbonyl iron (CI) particles are extensively employed in the synthesis of magnetorheological (MR) fluids. The advantage of using this particle is high saturation magnetization, low remanence, and shape [1–5]. A large number of applications were developed using this MR fluid [6]. On the other side, on prolong use of this MR fluid, the spherical particles change its shape, which results in a reduction in MR effect—the phenomena in which the strong dipoledipole interaction between the particles under the influence of the magnetic field increases the apparent viscosity of the fluid. A number of researchers have reported this effect of change in particle shape by tribology studies [7–9]. Similarly, Utami et al. [10] have reported the shape change * Ramesh V. Upadhyay [email protected] 1
P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology, CHARUSAT Campus, Changa, Gujarat 388421, India
2
C. S. Patel Institute of Technology, Department of Mechanical Engineering, Charotar University of Science and Technology, CHARUSAT Campus, Changa, Gujarat 388421, India
of CI particles after long-term cyclic operation when used in MR damper. The shape change of particle attributed to an onion like structure of CI-particles possesses. To overcome this, researchers have used different additives in the synthesis of MR fluid as well as different types of particles. In one such attempt, Kumbhar et al. [11] have synthesized MR fluid having electrolyte iron (EI) particles as well as CI particles and studied its rheological properties and its use in MR brake. The study concludes that the perform
Data Loading...
