Experimental Characterization of Efficiency Modes in a Rotating Magnetic Field Thruster

Abstract In this article the design and manufacture of the innovative MR rotary brake based on peristaltic pump inspired by the concept model of the pliers and the Rochester Pean forceps are presented . For the calculation and analysis of created structure comprehensive of roller, housing and pliers, simulations concerning the stress and strain are conducted to investigate the deformation and possible failure of part or assembly. Experimental tests including measurements of compression force and magnetic field were conducted to evaluate the performance of proposed designed MR rotary brake based on peristaltic pump system constituted by tube containing MR fluid and pliers with arm responsible of the movement and arm completely hold on bench vise

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Development of an axial rotating magnetic field multi-coil eddy current sensor for electromagnetic characterization of stratified CFRP materials

NDT & E International ◽

10.1016/j.ndteint.2021.102589 ◽

2021 ◽

pp. 102589

Author(s):

Ahmed Chaouki Lahrech ◽

Mohammed Naidjate ◽

Bachir Helifa ◽

Abdelhalim Zaoui ◽

Bachir Abdelhadi ◽

...

Keyword(s):

Magnetic Field ◽

Eddy Current ◽

Rotating Magnetic Field ◽

Current Sensor ◽

Eddy Current Sensor

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Experimental Droplet Formation of Magnetostrictive Inkjet Head to the Change of Driving Waveform

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.314-316.2334 ◽

2011 ◽

Vol 314-316 ◽

pp. 2334-2337

Author(s):

Jae Hyun Yoo ◽

Young Woo Park ◽

Kyung Hyun Yoon ◽

Eun Ju Yoo

Keyword(s):

Magnetic Field ◽

Constant Magnetic Field ◽

Fluid Flows ◽

Droplet Formation ◽

Experimental Characterization ◽

Droplet Volume ◽

Waveform Control ◽

Different Types ◽

Driving Waveform

This paper presents the experimental characterization of droplet formation in accordance with different types of driving waveform. The objective of the experiments is to generate sound droplets with a minimal volume depending on the types of driving waveform. For it, two types of driving waveform are used to investigate the droplet formation of the M-Jet: one is bipolar and another W-shaped. In the case of the bipolar waveform, ti lead to fluid flows from the liquid reservoir into the chamber in the M-Jet and th is time to impose a pulse under the constant magnetic field, resulting in the formation of the droplets. The droplet volume decreases as ti increases, and increases with further increase of ti. The threshold ti is equal to 500 s. The droplet volume decreases as th decreases, but the droplet formation was not successful at less than 550 s. In the case of the W-shaped waveform, maintains ti and th where is set from bipolar waveform, control the tr, where retracted MM keeps to control droplet volume. The tail becomes longer as tr increases. The droplet volume remains nearly constant as tr increases, but rapidly increases with further increase of tr. When the two driving waveform, the W-shaped driving waveform seems to be effective in reducing the droplet volume, and achieves the reduction of volume by 30 percent.

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Magnetic Field Sensors based on Magnetoresistance Effect in Organic Semiconductor Sandwich Devices

MRS Proceedings ◽

10.1557/proc-0906-hh03-07 ◽

2005 ◽

Vol 906 ◽

Author(s):

Govindarajan Veeraraghavan ◽

Ömer Mermer ◽

Yugang Sheng ◽

Tho Duc Nguyen ◽

Thomas Lee Francis ◽

...

Keyword(s):

Magnetic Field ◽

Organic Semiconductor ◽

Room Temperature ◽

Experimental Characterization ◽

Magnetoresistance Effect ◽

Temperature Dependent ◽

Magnetic Field Sensors ◽

Mr Effect ◽

Alternating Magnetic Fields

AbstractWe describe magnetic field sensors based on a recently discovered magnetoresistance (MR) effect in nonmagnetic organic semiconductor sandwich devices. The MR effect reaches up to 10% in a magnetic field of 10 mT at room temperature. We perform an extensive experimental characterization of this effect. We found that the MR effect is only weakly temperature dependent and does not depend on sign and direction of the applied magnetic field. We also measured the device response to alternating magnetic fields up to 100 kHz. To the best of our knowledge, the discovered MR effect is not adequately described by any of the MR mechanisms known to date.

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Experimental Characterization of Geometric Aspects of the Behavior of Magnetic Shape Memory Materials and Theoretical Interpretation

European Journal of Engineering Research and Science ◽

10.24018/ejers.2019.4.3.1147 ◽

2019 ◽

Vol 4 (3) ◽

pp. 121-126

Author(s):

Juan Manuel Hernandez ◽

P. Mullner ◽

P. Linquist ◽

J. Carreraa

Keyword(s):

Magnetic Field ◽

Geometric Analysis ◽

Martensite Phase ◽

Rotating Magnetic Field ◽

Small Samples ◽

Elastic Behavior ◽

Theoretical Interpretation ◽

Magnetic Shape Memory

Small samples of a Ni-Mn-Ga single crystal of three different geometries were subjected to bending by applying a rotating magnetic field. The magneto-mechanical behavior of the sample in cantilever was analyzed and special attention was given to elongations and curvature along the deformation process. A sequence of 3000 images was made using a high-resolution camera and the data was analyzed using a code in Matlab. Furthermore, the geometric analysis showed that, when the magnetic field is equal to cero, the sample do not recover its original shape totally and the presence of a pseudo-elastic behavior was observed. Analysis and interpretation of the data allows the presentation of some hypotheses concerning to the crystalline structure and the role of dislocations, represented by a dislocation density, in the martensite phase of these materials. These hypotheses are discussed more formally in the second part of this paper. Some experiments are proposed that would give the opportunity to a wider theoretical knowledge of MSMM.

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Development of Fluxgate Magnetometers Based on Fe61Co19Si5B15 Amorphous Ribbons

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.605.697 ◽

2014 ◽

Vol 605 ◽

pp. 697-700

Author(s):

Sotiria Vaitsi

Keyword(s):

Magnetic Field ◽

Magnetic Core ◽

Field Variable ◽

Experimental Characterization ◽

Dc Voltage ◽

Amorphous Ribbons ◽

Different Types ◽

The Magnetic Field

This paper deals with the characterization of fluxgate magnetometers that adopt a Fe61Co19Si5B15 ribbons as magnetic core. The experimental characterization concerned the dependence of Δt and ΔV according to the magnetic field Hdc. The change of the field (variable input) held by changing the offset, adding a small dc voltage to ac, taking in extremely important results. Still, examined the dependence of ΔV on the frequency for two different types of coils, a circular and an oval coil, made of the same material, Fe61Co19Si5B15.

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A mechanical characterization of electroconductive magnetorheological elastomer and semi-analytical modeling of magnetic force

International Journal of Modern Physics B ◽

10.1142/s0217979219502904 ◽

2019 ◽

Vol 33 (25) ◽

pp. 1950290

Author(s):

Salah Aguib ◽

Abdelkader Nour ◽

Toufik Djedid

Keyword(s):

Magnetic Field ◽

Magnetic Force ◽

Magnetic Field Intensity ◽

Experimental Characterization ◽

Iron Particles ◽

Magnetorheological Elastomer ◽

Magnetorheological Elastomers ◽

Global Industry ◽

The Magnetic Field

Materials with novel properties and compounds of intelligent material combinations are a key to innovation in various successful sectors of the global industry as well as for its export. Magnetorheological elastomer materials have interesting physical properties; most of these properties are modified and adapted under the influence of external parameters such as the magnetic field. In this work, an experimental characterization of the magnetorheological elastomers (MRE) loaded with 20% of the iron particles was made. The results showed that the properties of these materials can be modified very selectively and reversibly under the influence of magnetic field, where the stiffness of the material varies depending on the magnetic field intensity that influences the attractive force between iron particles.

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