Analysis for Mechanical Properties of Spiral Accumulating Core Used for Permanent Magnet Motor

2008 ◽  
Vol 385-387 ◽  
pp. 37-40
Author(s):  
Naoaki Noda ◽  
Biao Zhang ◽  
Kazuhiko Yonemaru ◽  
Shota Higo ◽  
Yoshihiro Takamatu
Keyword(s):  
Permanent Magnet ◽  
Young’S Modulus ◽  
Steel Sheet ◽  
Young's Modulus ◽  
Dimensional Accuracy ◽  
Core System ◽  
Thickness Change ◽  
The Core ◽  
Bending Process ◽  
Electric Loss

Recently, permanent magnet motors are widely used in many industrial fields because they are suitable for compact mechanical system. The motor core is usually manufactured from magnetic steel sheet with press machine. However, usually most parts of the plate are scraped, and only small percent of the sheet is used for the core. The spiral accumulating core system is suitable for manufacturing the core more ecologically because in this system more than 50% of the magnet steel sheet can be used. In this study, therefore, the effective Young’s modulus of the spiral accumulating core is considered in order to find out a good method to fix the core. In this analysis, the finite element method is applied to 3D models, whose layers and slits are periodically arranged. Stress and thickness distributions are also analyzed in the bending process. When the spiral core is manufactured through spiral accumulating system with plate-bending process, the thickness change should be minimized because that may deteriorate dimensional accuracy of the spiral core. Also residual bending stress is investigated because that may cause an electric loss. The results indicate that plastic zone is limited at localized regions and therefore an electric loss is not very large. The effective Young’s modulus of the 3D dimensions model of the real spiral accumulating core is estimated about 127.5 GPa.

Effective Young’s Modulus of Spiral Accumulating Core Used for Permanent Magnet Motor

2010 ◽  
Vol 452-453 ◽  
pp. 237-240
Author(s):  
Yasushi Takase ◽  
Hisataka Takada ◽  
Naoaki Noda
Keyword(s):  
Permanent Magnet ◽  
Young’S Modulus ◽  
Steel Sheet ◽  
Young's Modulus ◽  
Good Method ◽  
3D Models ◽  
Permanent Magnet Motor ◽  
Core System ◽  
Method Of Calculation ◽  
The Core

Recently, permanent magnet motors are widely used in wide industrial fields because they are suitable for compact mechanical system. The motor core is usually manufactured from magnetic steel sheet with press machine. However, usually most parts of the plate are scalped, and only small percent of the sheet is used for the core. The spiral accumulating core system is suitable for manufacturing the core more ecologically because in this system more than 50% of the magnet steel sheet can be used. In this study, therefore, the effective Young’s modulus of the spiral accumulating core is considered in order to find out a good method to fix the core. In this analysis, effective Young’s modulus of spiral accumulating core used for permanent magnet motor is considered by the application of the finite element method to 3D models, whose layers and slits are periodically arranged. Then, effects of slits, layers and embossing interlockings on effective Young’s modulus are analyzed. Finally, a convenient method of calculation based on rule of mixture is newly proposed for estimating the effective Young’s modulus of the real spiral accumulating core.

Effect of Transformation on Springback for TRIP Steel Stamping

2011 ◽  
Vol 221 ◽  
pp. 405-410 ◽  
Author(s):  
Li Liu ◽  
Ti Kun Shan
Keyword(s):  
Martensitic Transformation ◽  
Young’S Modulus ◽  
Trip Steel ◽  
Steel Sheet ◽  
Young's Modulus ◽  
Sheet Steel ◽  
Transformation Kinetics ◽  
Sheet Stamping ◽  
Trip Steel Sheet ◽  
Springback Prediction

A relation between the Young’s modulus and the martensitic transformation during TRIP sheet steel stamping is investigated. A TRIP steel, TRIP600, is used to study the phenomenon. The transformation kinetics under different loading paths were gotten through simple-shear, uniaxial tension, plane strain and equibiaxial stretching tests. The Young’s modulus, which plays an important role in accurate springback prediction for TRIP steel sheet stamping, is changed with the martensitic transformation during TRIP steel deformation. To improve the accuracy of springback simulation, the constitutive model of the TRIP steel is developed considering the variation of the Young’s modulus with the martensitic transformation. The accuracy of the proposed method is verified by the experimental results.

scholarly journals Correlations of Geometry and Infill Degree of Extrusion Additively Manufactured 316L Stainless Steel Components

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5173
Author(s):  
Tobias Rosnitschek ◽  
Andressa Seefeldt ◽  
Bettina Alber-Laukant ◽  
Thomas Neumeyer ◽  
Volker Altstädt ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Product Development ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Dimensional Accuracy ◽  
Product Development Process ◽  
Stainless Steel 316L ◽  
Before And After ◽  
Metal Extrusion

This study focuses on the effect of part geometry and infill degrees on effective mechanical properties of extrusion additively manufactured stainless steel 316L parts produced with BASF’s Ultrafuse 316LX filament. Knowledge about correlations between infill degrees, mechanical properties and dimensional deviations are essential to enhance the part performance and further establish efficient methods for the product development for lightweight metal engineering applications. To investigate the effective Young’s modulus, yield strength and bending stress, standard testing methods for tensile testing and bending testing were used. For evaluating the dimensional accuracy, the tensile and bending specimens were measured before and after sintering to analyze anisotropic shrinkage effects and dimensional deviations linked to the infill structure. The results showed that dimensions larger than 10 mm have minor geometrical deviations and that the effective Young’s modulus varied in the range of 176%. These findings provide a more profound understanding of the process and its capabilities and enhance the product development process for metal extrusion-based additive manufacturing.

Bending Process and Young's Modulus of Fullerene C60Nanowhiskers

2009 ◽  
Vol 48 (1) ◽  
pp. 010217 ◽  
Author(s):  
Kazuma Saito ◽  
Kun'ichi Miyazawa ◽  
Tokushi Kizuka
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Bending Process

Development of ABS based wire as feedstock filament of FDM for industrial applications

2016 ◽  
Vol 22 (2) ◽  
pp. 300-310 ◽  
Author(s):  
Rupinder Singh ◽  
Sunpreet Singh ◽  
Karan Mankotia
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Mathematical Models ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Dimensional Accuracy ◽  
Cost Effective ◽  
Small Scale ◽  
Content Type ◽  
Fused Deposition

Purpose Acrylonitrile-butadiene-styrene (ABS)-based plastic is one of the most widely used filament materials for fused deposition modelling (FDM) applications. Because the FDM system, as well as its filament material (ABS), has been patented by commercial manufacturers, the cost of the filament material is significantly high, which affects the commercialization of this technology for medium- and small-scale industries. This problem may be addressed by developing alternative FDM filament material at the user end. The present research work aims to make an effort to develop cost-effective ABS filament with acceptable mechanical properties at par with the filament prepared by commercial manufacturers. Further, mathematical models have been developed for optimizing mechanical properties (like: tensile strength, Young’s modulus and dimensional accuracy) of in-house-fabricated filament. Design/methodology/approach The processing parameters (such as barrel temperature, screw speed and take-up speed) of single-screw extruder used to fabricate ABS filament have been studied and optimized. Findings Although the mechanical properties of fabricated ABS filament were not better than those of the original equipment manufacturer (OEM) filament, yet significant cost reduction was achieved with in-house fabrication. Mechanical properties like tensile strength, Young’s modulus and dimensional accuracy have been optimized using response surface methodology (RSM) for acceptability of in-house-fabricated filament (for commercial applications) at par with the OEM filament. Originality/value This paper highlights the systematic steps for in-house fabrication of cost-effective FDM filament. Further, RSM-based mathematical models have been developed for optimizing mechanical properties of newly fabricated filament.

scholarly journals Effects of Pressurizing Cryogenic Treatments on Physical and Mechanical Properties of Shale Core Samples—An Experimental Study

Gases ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 33-50
Author(s):  
Rayan Khalil ◽  
Hossein Emadi ◽  
Faisal Altawati
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
Poisson’S Ratio ◽  
Young's Modulus ◽  
Cryogenic Treatment ◽  
Poisson's Ratio ◽  
The Core ◽  
Core Samples ◽  
Bulk Compressibility ◽  
Core Holder

The technique of cryogenic treatments requires injecting extremely cold fluids such as liquid nitrogen (LN2) into formations to create fractures in addition to connecting pre-existing fracture networks. This study investigated the effects of implementing and pressurizing cryogenic treatment on the physical (porosity and permeability) and mechanical properties (Young’s modulus, Poisson’s ratio, and bulk compressibility) of the Marcellus shale samples. Ten Marcellus core samples were inserted in a core holder and heated to 66 °C using an oven. Then, LN2 (−177 °C) was injected into the samples at approximately 0.14 MPa. Nitrogen was used to pressurize nine samples at injection pressures of 1.38, 2.76, and 4.14 MPa while the tenth core sample was not pressurized. Using a cryogenic pressure transducer and a T-type thermocouple, the pressure and temperature of the core holder were monitored and recorded during the test. The core samples were scanned using a computed tomography (CT) scanner, and their porosities, permeability, and ultrasonic velocities were measured both before and after conducting the cryogenic treatments. The analyses of CT scan results illustrated that conducting cryogenic treatments created new cracks inside all the samples. These cracks increased the pore volume, and as a result, the porosity, permeability, and bulk compressibility of the core samples increased. The creations of the new cracks also resulted in reductions in the compressional and shear velocities of the samples, and as a result, decreasing the Young’s modulus and Poisson’s ratio. Moreover, the results revealed that pressurizing the injected LN2 increased the alterations of aforementioned properties.

scholarly journals Characterization of the ageing of an epoxy resin using high temperature nanoindentation

2019 ◽  
Vol 107 (2) ◽  
pp. 206
Author(s):  
Bruno Passilly ◽  
Romain Delannoy
Keyword(s):  
High Temperature ◽  
Epoxy Resin ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Organic Matrix ◽  
Ambient Air ◽  
Thermal Ageing ◽  
The Core ◽  
Indentation Tests ◽  
And Behavior

This article aims to understand better the mechanical properties and behavior of organic matrix composite materials under elevated temperature conditions. Two specific specimens of cured RTM6 epoxy resin are tested with DMA analysis: one being unaged and the other one aged for 5000 h at 130 °C under ambient air. Anti-plasticization effects seem to occur on aged resin. Series of nano-indentation tests are carried out from the surface to the core of the sample so as to measure gradient properties of the resin, at temperatures up to 150 °C using a high temperature indentation machine prototype. Thermo-oxidation phenomena involve oxidized layer formation during thermal ageing of the epoxy resin which is characterized through measurements of indentation Young’s modulus. After aged treatment, the variation of Young’s modulus of the oxidized layer at the surface of the sample is not clearly affected by the increasing test temperature whereas Young’s modulus of the core of the sample is decreasing significantly with the temperature test as on unaged epoxy resin. Thus, asymptotic growing of the oxidized layer is then confirmed.

scholarly journals Modeling of radial variations of wood properties in naturally regenerated trees of Betula platyphylla grown in Selenge, Mongolia

2021 ◽  
Vol 67 (1) ◽  
Author(s):  
Togtokhbayar Erdene-Ochir ◽  
Futoshi Ishiguri ◽  
Ikumi Nezu ◽  
Bayasaa Tumenjargal ◽  
Bayartsetseg Baasan ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Basic Density ◽  
Wood Properties ◽  
Mixed Effects ◽  
Dry Density ◽  
Betula Platyphylla ◽  
The Core ◽  
Dynamic Young’S Modulus ◽  
Dynamic Young's Modulus

AbstractWood properties, such as annual ring width, wood fiber length, vessel element length, basic density, air-dry density, dynamic Young’s modulus, modulus of elasticity (MOE), modulus of rupture (MOR), absorbed energy in impact bending, compressive strength parallel to grain, and shearing strength, were investigated for wood from 10 naturally regenerated trees of Betula platyphylla Sukaczev in Mandal, Selenge, Mongolia. Mixed-effects models were used to evaluate the radial variations in the wood properties. The mean values of wood properties obtained in the present study were in almost the same range, with a few exceptions, as those reported by other researchers for other Betula species. The radial variations of wood properties in B. platyphylla were well-fitted to a nonlinear mixed-effects model (logarithmic formula); all examined wood properties increased from the pith and then became constant toward the bark side. The wood properties significantly differed between the core and outer wood. Basic density, air-dry density, and dynamic Young’s modulus were significantly correlated with MOE, MOR, and compressive strength. It is concluded that when the wood of B. platyphylla is utilized as raw materials for solid wood products, the differences between the core wood and outer wood should be considered. In addition, the selection of wood with higher strength properties can be achieved using the wood density and dynamic Young’s modulus as indicators.

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