Coupled FEM simulation for the characterization of the fluid flow within a micromachined cantilever valve

Computational simulation has become more important in the design of thermomechanical processing since it allows the optimization of associated parameters such as temperature, stresses, strains and phase transformations. This work presents the results of the three-dimensional Finite Element Method (FEM) simulation of the hot rolling process of a medium Mn steel using DEFORM-3D software. Temperature and effective strain distribution in the surface and center of the sheet were analyzed for different rolling passes; also the change in damage factor was evaluated. According to the hot rolling simulation results, experimental hot rolling parameters were established in order to obtain the desired microstructure avoiding the presence of ferrite precipitation during the process. The microstructural characterization of the hot rolled steel was carried out using optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that the phases present in the steel after hot rolling are austenite and α′-martensite. Additionally, to understand the mechanical behavior, tensile tests were performed and concluded that this new steel can be catalogued in the third automotive generation.

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On the characterization of interstitial fluid flow in the skeletal muscle endomysium

Journal of the Mechanical Behavior of Biomedical Materials ◽

10.1016/j.jmbbm.2019.103504 ◽

2020 ◽

Vol 102 ◽

pp. 103504 ◽

Cited By ~ 2

Author(s):

Qiuyun Wang ◽

Shaopeng Pei ◽

X. Lucas Lu ◽

Liyun Wang ◽

Qianhong Wu

Keyword(s):

Skeletal Muscle ◽

Fluid Flow ◽

Interstitial Fluid ◽

Interstitial Fluid Flow

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The Role of Fluid Flow Phenomena in the Czochralski Growth of Oxides.

MRS Proceedings ◽

10.1557/proc-9-373 ◽

1981 ◽

Vol 9 ◽

Author(s):

D.C. Miller

Keyword(s):

Fluid Flow ◽

Defect Density ◽

Major Effect ◽

Czochralski Growth ◽

Simulation Experiments ◽

Direct Measurements ◽

Flow Geometry ◽

Flow Phenomena

ABSTRACTIn the Czochralski growth of single crystals from large melts, fluid flow phenomena have a major effect on interface shape, growth striations, defect density and the length of crystals which can be grown from a melt of given volume and thermal geometry. Because of the technical difficulties encountered in making direct measurements in molten oxides, simulation experiments have been extensively utilized to gain insight into melt behavior.Both temperature profile and flow geometry results from simulation experiments are discussed. This data is supported by direct melt observations and results from the characterization of grown crystals. When reviewed together, this information offers new insights into the complex behavior of Czochralski growth processes, including the role of thermal gradients, crystal rotation, and surface tension driven (Marangoni) convection.

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Thermal Fluid Flow Analysis for Temperature Characterization of Mold Transformer in Distribution Power System

The Transactions of the Korean Institute of Electrical Engineers P ◽

10.5370/kieep.2013.62.1.006 ◽

2013 ◽

Vol 62 (1) ◽

pp. 6-11 ◽

Cited By ~ 1

Author(s):

Ji-Ho Kim ◽

Jeong-Gun Lee ◽

Ki-Sik Lee ◽

Wook Rhee ◽

Hyang-Beom Lee

Keyword(s):

Fluid Flow ◽

Power System ◽

Flow Analysis ◽

Thermal Fluid Flow ◽

Fluid Flow Analysis

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Performance Study of Split Ferrite Cores Designed for EMI Suppression on Cables

Electronics ◽

10.3390/electronics9121992 ◽

2020 ◽

Vol 9 (12) ◽

pp. 1992

Author(s):

Adrian Suarez ◽

Jorge Victoria ◽

Jose Torres ◽

Pedro A. Martinez ◽

Antonio Alcarria ◽

...

Keyword(s):

Electromagnetic Compatibility ◽

Electronic Device ◽

Fem Simulation ◽

Power Cables ◽

Performance Study ◽

External Power Source ◽

External Power ◽

Cable Assembly ◽

Wired Communication

The ideal procedure to start designing an electronic device is to consider the electromagnetic compatibility (EMC) from the beginning. Even so, EMC problems can appear afterward, especially when the designed system is interconnected with external devices. Thereby, electromagnetic interferences (EMIs) could be transmitted to our device from power cables that interconnect it with an external power source or are connected to another system to establish wired communication. The application of an EMI suppressor such as a sleeve core that encircles the cables is a widely used technique to attenuate EM disturbances. This contribution is focused on the characterization of a variation of this cable filtering solution based on openable core clamp or snap ferrites. This component is manufactured by two split parts pressed together by a snap-on mechanism which turns this into a quick, easy to install solution for reducing post-cable assembly EMI problems. The performance of three different materials, including two polycrystalline (MnZn and NiZn) materials and nanocrystalline (NC) solution, are analyzed in terms of effectiveness when the solid sleeve cores are split. The possibility of splitting an NC core implies an innovative technique due to the brittleness of this material. Thus, the results obtained from this research make it possible to evaluate this sample’s effectiveness compared to the polycrystalline ones. This characterization is carried out by the introduction of different gaps between the different split-cores and analyzing their behavior in terms of relative permeability and impedance. The results obtained experimentally are corroborated with the results obtained by a finite element method (FEM) simulation model with the aim of determining the performance of each material when it is used as an openable core clamp.

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Investigation of a plain ball burnishing process on differently machined Aluminium EN AW 2007 surfaces

MATEC Web of Conferences ◽

10.1051/matecconf/201819011005 ◽

2018 ◽

Vol 190 ◽

pp. 11005 ◽

Cited By ~ 3

Author(s):

Marco Posdzich ◽

Rico Stöckmann ◽

Florian Morczinek ◽

Matthias Putz

Keyword(s):

Surface Roughness ◽

Process Parameters ◽

Process Development ◽

Fem Simulation ◽

Initial Surface ◽

Shape Deviation ◽

Finishing Process ◽

Path Distance ◽

Burnishing Process

Burnishing is an effective chipless finishing process for improving workpiece properties: hardness, vibration resistance and surface quality. The application of this technology is limited to rotationally symmetrical structures of deformable metals. Because of the multiaxial characteristics, the transfer of this force controlled technology on to prismatic shapes requires a comprehensive process development. The main purpose of this paper is the characterization of a plain burnishing process on aluminium EN AW 2007 with a linear moved, spherical diamond tool. The method of design of experiments was used to investigate the influence of different machined surfaces in conjunction with process parameters: burnishing force, burnishing direction, path distance and burnishing speed. FEM simulation was utilized for strain and stress analysis. The experiments show, that unlike the process parameters the initial surface roughness as 3rd order shape deviation does not have a significant influence on the finished surface. Furthermore a completely new surface is created by the process, with properties independent from the initial surface roughness.

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