scholarly journals Design, Manufacture and Experimental Characterization of Magnetorheological Rotary Brake Based on an Peristaltic Pump System

2021 ◽  
Author(s):  
Tomasz Korona ◽  
Pawel Kowol ◽  
GRAZIA LO SCIUTO
Keyword(s):  
Magnetic Field ◽  
Experimental Tests ◽  
Stress And Strain ◽  
Peristaltic Pump ◽  
Experimental Characterization ◽  
Compression Force ◽  
Pump System ◽  
Concept Model ◽  
Design And Manufacture

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

scholarly journals Technical Note: Experimental characterization of the dose deposition in parallel MRI‐linacs at various magnetic field strengths

2019 ◽  
Vol 46 (11) ◽  
pp. 5152-5158
Author(s):  
Jarrad Begg ◽  
Sarah J. Alnaghy ◽  
Trent Causer ◽  
Thahabah Alharthi ◽  
Armia George ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Technical Note ◽  
Experimental Characterization ◽  
Parallel Mri ◽  
Dose Deposition ◽  
Field Strengths

scholarly journals Future-Oriented Experimental Characterization of 3D Printed and Conventional Elastomers Based on Their Swelling Behavior

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4402
Author(s):  
Klara Loos ◽  
Vivianne Marie Bruère ◽  
Benedikt Demmel ◽  
Yvonne Ilmberger ◽  
Alexander Lion ◽  
...  
Keyword(s):  
Tensile Tests ◽  
Swelling Behavior ◽  
Uniaxial Tensile ◽  
Stress And Strain ◽  
Experimental Characterization ◽  
Synthetic Fuels ◽  
Fuel Component ◽  
3D Printed ◽  
Fuel Components

The present study investigates different elastomers with regard to their behavior towards liquids such as moisture, fuels, or fuel components. First, four additively manufactured materials are examined in detail with respect to their swelling in the fuel component toluene as well as in water. The chemical nature of the materials is elucidated by means of infrared spectroscopy. The experimentally derived absorption curves of the materials in the liquids are described mathematically using Fick’s diffusion law. The mechanical behavior is determined by uniaxial tensile tests, which are evaluated on the basis of stress and strain at break. The results of the study allow for deriving valuable recommendations regarding the printing process and postprocessing. Second, this article investigates the swelling behavior of new as well as thermo-oxidatively aged elastomers in synthetic fuels. For this purpose, an analysis routine is presented using sorption experiments combined with gas chromatography and mass spectrometry and is thus capable of analyzing the swelling behavior multifacetted. The transition of elastomer constituents into the surrounding fuel at different aging and sorption times is determined precisely. The change in mechanical properties is quantified using density measurements, micro Shore A hardness measurements, and the parameters stress and strain at break from uniaxial tensile tests.

Design and Experimental Characterization of a Non Intrusive Measurement System of Rotating Blade Vibration

1993 ◽  
Author(s):  
P. Nava ◽  
N. Paone ◽  
G. L. Rossi ◽  
E. P. Tomasini
Keyword(s):  
Measurement System ◽  
Fiber Optic ◽  
Experimental Tests ◽  
Data Acquisition System ◽  
Fiber Optic Sensors ◽  
Experimental Characterization ◽  
Blade Vibration ◽  
Rotating Blade ◽  
Strain Gauge Measurements

A measurement system for non-intrusive monitoring of rotating blade vibration in turbomachines based on fiber optic sensors is presented. The design of the whole system is discussed; the development of special purpose sensors, their interfacing to the data acquisition system and the signal processing are outlined. The processing algorithms are tested by software simulation for several possible blade vibrations. Experimental tests performed on different bladed rotors are presented. Results are compared to simultaneous strain gauge measurements.

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

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.

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

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.

Experimental Characterization of Masonry Panels Strengthened with NFRCM

2021 ◽  
Vol 898 ◽  
pp. 43-48
Author(s):  
Claudia Brito de Carvalho Bello ◽  
Daniele Baraldi ◽  
Antonella Cecchi ◽  
Daniel V. Oliveira
Keyword(s):  
Mechanical Behavior ◽  
Natural Fibers ◽  
Experimental Tests ◽  
Experimental Characterization ◽  
Cementitious Matrix ◽  
Experimental Campaign ◽  
Innovative Materials ◽  
Sustainable Materials ◽  
Fabric Reinforced Cementitious Matrix

In the last years, the interest in eco-sustainable composites has consistently increased. Such innovative materials are actually a promising sustainable solution for structural strengthening since they can be an alternative to petroleum‐based materials, which are frequently used for masonry retrofitting. This work describes an experimental campaign dedicated to investigating the behavior of Fabric-Reinforced Cementitious Matrix (FRCM) with natural fibers (NFRCM) made with eco-sustainable materials. Experimental tests are performed on unreinforced masonry panels (URM) and reinforced ones (RM), for characterizing their mechanical behavior. URM samples are compared with RM ones accounting for their response under shear actions.

Development of Fluxgate Magnetometers Based on Fe61Co19Si5B15 Amorphous Ribbons

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.

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

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.

Design and Experimental Characterization of a Nonintrusive Measurement System of Rotating Blade Vibration

1994 ◽  
Vol 116 (3) ◽  
pp. 657-662 ◽  
Author(s):  
P. Nava ◽  
N. Paone ◽  
G. L. Rossi ◽  
E. P. Tomasini
Keyword(s):  
Measurement System ◽  
Fiber Optic ◽  
Experimental Tests ◽  
Fiber Optic Sensors ◽  
Experimental Characterization ◽  
Blade Vibration ◽  
Rotating Blade ◽  
Nonintrusive Measurement ◽  
Nonintrusive Monitoring

A measurement system for nonintrusive monitoring of rotating blade vibration in turbomachines based on fiber optic sensors is presented. The design of the whole system is discussed; the development of special purpose sensors, their interfacing to the data acquisition system, and the signal processing are outlined. The processing algorithms are tested by software simulation for several possible blade vibrations. Experimental tests performed on different bladed rotors are presented. Results are compared to simultaneous strain gage measurements.

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