scholarly journals A Magneto-Hyperelastic Model for Silicone Rubber-Based Isotropic Magnetorheological Elastomer under Quasi-Static Compressive Loading

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2435
Author(s):  
Yanliang Qiao ◽  
Jiangtao Zhang ◽  
Mei Zhang ◽  
Lisheng Liu ◽  
Pengcheng Zhai
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Silicone Rubber ◽  
Experimental Results ◽  
Magnetic Flux Density ◽  
Magnetorheological Elastomer ◽  
Static Compression ◽  
Compression Property ◽  
Hyperelastic Model ◽  
Quasi Static Compression

A new magneto-hyperelastic model was developed to describe the quasi-static compression behavior of silicone rubber-based isotropic magnetorheological elastomer (MRE) in this work. The magnetization property of MRE was characterized by a vibrating sample magnetometer (VSM), and the quasi-static compression property under different magnetic fields was tested by using a universal testing machine equipped with a magnetic field accessory. Experimental results suggested that the stiffness of the isotropic MRE increased with the magnetic flux density within the tested range. Based on experimental results, a new magneto-hyperelastic model was established by coupling the Ogden hyperelastic model, the magnetization model and the magneto-induced modulus model based on a magnetic dipole theory. The results show that the proposed new model can accurately predict the quasi-static compression property of the isotropic MRE under the tested magnetic flux density and strain ranges using only three model parameters.

Study Electromagnetic Pump Based on Ionic Liquids

2013 ◽  
Vol 437 ◽  
pp. 540-543
Author(s):  
Jing Wan ◽  
Zhi Bo Wang ◽  
Xiao Tao Zhou ◽  
Yu Mei Zhang ◽  
Su Hua Chen ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Magnetic Flux ◽  
Flux Density ◽  
Flow Rate ◽  
Single Phase ◽  
Pressure Head ◽  
Experimental Results ◽  
Magnetic Flux Density ◽  
Electromagnetic Pump

Ionic liquids are rising materials with unique excellence. Here the electromagnetic pump based on ionic liquids are presented. The pressure head difference is 3.2mm at 15 VDC and 0.4T. The flow rate is 8.6μl/s at 8VDC and 128μl/s at 21VDC when the magnetic flux density is 0.4T. The performances obtained theoretically in single phase are compared with the experimental results.

scholarly journals Calibration of ac induction magnetometer

2018 ◽  
Vol 31 (4) ◽  
pp. 613-626 ◽  
Author(s):  
Branko Koprivica ◽  
Marko Sucurovic ◽  
Alenka Milovanovic
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Flux Density ◽  
Field Measurement ◽  
Large Diameter ◽  
Experimental Results ◽  
Magnetic Flux Density ◽  
Magnetic Field Measurement ◽  
Experimental Setup ◽  
Coil System

The aim of this paper is to describe a procedure and experimental setup for calibration of AC induction magnetometer. The paper presents an overview of the previous research and results of measurement of magnetic flux density inside large diameter multilayer solenoid. This solenoid is magnetising coil of the magnetometer. The paper also describes a system of five smaller coils of the magnetometer which are placed inside the large solenoid. Three small coils are pickup coils, accompanied with two compensation coils, of which one is an empty coil for magnetic field measurement. The experimental results of calibration of this coil system have been presented. A proper discussion of all the results presented has been also given in the paper.

scholarly journals Design of a New 1D Halbach Magnet Array with Good Sinusoidal Magnetic Field by Analyzing the Curved Surface

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2522
Author(s):  
Guangdou Liu ◽  
Shiqin Hou ◽  
Xingping Xu ◽  
Wensheng Xiao
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Permanent Magnet ◽  
Flux Density ◽  
Permanent Magnets ◽  
Air Gap ◽  
Curved Surface ◽  
Magnetic Flux Density ◽  
Sinusoidal Magnetic Field ◽  
The Magnetic Field

In the linear and planar motors, the 1D Halbach magnet array is extensively used. The sinusoidal property of the magnetic field deteriorates by analyzing the magnetic field at a small air gap. Therefore, a new 1D Halbach magnet array is proposed, in which the permanent magnet with a curved surface is applied. Based on the superposition of principle and Fourier series, the magnetic flux density distribution is derived. The optimized curved surface is obtained and fitted by a polynomial. The sinusoidal magnetic field is verified by comparing it with the magnetic flux density of the finite element model. Through the analysis of different dimensions of the permanent magnet array, the optimization result has good applicability. The force ripple can be significantly reduced by the new magnet array. The effect on the mass and air gap is investigated compared with a conventional magnet array with rectangular permanent magnets. In conclusion, the new magnet array design has the scalability to be extended to various sizes of motor and is especially suitable for small air gap applications.

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