• Title/Summary/Keyword: 3D Finite element analysis

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3D Finite Element Analysis of Contactless Power Supply with Linear Servo Motor (선형 서보 전동기가 결합된 비접촉 전력 전달 장치의 3차원 유한요소 해석)

  • Woo, Kyung-Il;Park, Han-Seok;Park, Hyong-Bum;Jung, Hong-Seob;Cho, Yun-Hyun
    • Proceedings of the KIEE Conference
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    • 2006.07b
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    • pp.819-820
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    • 2006
  • This paper presents the 3D finite element analysis of contactless power supply with linear servo motor. The voltage source is used to analyze the characteristics of contactless power supply. The primary, secondary self and leakage inductances and the capacitances of a resonant circuit are calculated by the previous finite element analysis are used. Also the driving circuit to supply the power to the linear servo motor is designed. The characteristics analysis of contactless power supply considering the linear servo motor is done.

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A Study on the Voxel Mesh Technique for Finite Element Modeling of Human Bone (인체 골(bone)의 유한요소 모델링을 위한 VOXEL MESH 기법에 관한 연구)

  • 변창환;오택열;백승민;채경덕
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.10a
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    • pp.1081-1084
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    • 2002
  • In this study, we perform 3-D reconstruction of human proximal femur from DICOM files by using voxel mesh algorithm. After 3-D reconstruction, the model converted to Finite Element model which developed for automatically making not only 3-D geometrical model but also FE model from medical image dataset. During this job, trabecular pattern, one of characteristic of human bone can be added to the model by means of giving it's own elastic property calculated from intensity in CT scanned image to the each voxel. And then another model is made from same image dataset which have two material properties - one corresponds to cortical bone, another to trabecular bone. Finally, validity of voxel mesh technique is verified through comparing results of FE analysis, free vibration and stress analysis.

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Simplified 3D Finite Element Analysis of Linear Inductor Motor for Integrated Magnetic Suspension/Propulsion Applications (자기부상 및 추진 일체형 리니어 인덕터 모터의 간이형 3차원 유한요소해석)

  • Jeong, Sang-Sub;Jang, Seok-Myeong
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.49 no.6
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    • pp.371-379
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    • 2000
  • The 4-pole linear homopolar synchronous motor (LHSM), so called linear inductor motor, is composed of the figure-of-eight shaped 3-phase armature windings, DC field windings, and the segmented secondary with the transverse bar track. To reduce the calculation time, the simplified 3D finite element model with equivalent reluctance and/or permanent magnet is presented. To obtain a clear understanding, propriety and usefulness of the developed model, we compare with the results of simplified 3D FEA, general 3D FEA and test. Consequently, the results of simplified and 3D FEM analysis are nearly identical, but much larger than that of static test at d-axis armature excitation. Therefore the improved FEA model, such as full model with half slot, is needed for the precise analysis.

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An Analysis of Flat DMT Penetration Based on a Large strain Formulation (대변형을 고려한 flat DMT의 3차원 관입 해석)

  • Byeon, Wi-Yong;Lee, Seung-Rae
    • Journal of the Korean Geotechnical Society
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    • v.23 no.1
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    • pp.67-76
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    • 2007
  • Flat DMT penetration was analyzed using a finite element model based on a large strain formulation. The ABAQUS/Explicit, a commercial finite element method, was used to study the flat DMT penetration in soils. Then, because the very large mesh distortion occurred due to the penetration of flat DMT, the adaptive meshing technique was utilized to maintain a high quality mesh configuration. The undrained shear strength obtained from the flat DMT is estimated using only the horizontal stress index ($K_{D}$) and so it became necessary to examine using the analysis results obtained from the penetration of the flat DMT. Analysis results show that in normally consolidated region of $K_{D}=2$, the results obtained from the correlations proposed by Marchetti show good agreement with those estimated from the finite element method. The present analysis also shows that in overconsolidated region of $K_{D}>2$, the results obtained from the relationships proposed by Kamei and Iwasaki show good agreement with those provided by the penetration analysis.

Postbuckling Behavior of Composite Laminated Cylinder under Lateral Pressure (횡방향 압력을 받는 복합적층 원통실린더의 좌굴후 거동해석)

  • 조종두;김헌주
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1994.10a
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    • pp.843-846
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    • 1994
  • The bucking and postbuckling behavior of composite laminated long cylinders under lateral pressure are investigated by the nonlinear finite element method. A long cylinder of 3-D shell problem is modelled as 2-D plane strain problem for analysis. And for the finite element analysis, eight nodes quadratic element is utilized. Arc-length method is adopted for the iteration and load-increment along postbuckling equilibrium path. The composite laminated cylinders in study are composed of cross-plied uniaxially reinforced shells. As a prsult, buckling load and postbuckling behavior are discussed.

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Numerical simulation on structural behavior of UHPFRC beams with steel and GFRP bars

  • Yoo, Doo-Yeol;Banthia, Nemkumar
    • Computers and Concrete
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    • v.16 no.5
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    • pp.759-774
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    • 2015
  • This study simulates the flexural behavior of ultra-high-performance fiber-reinforced concrete (UHPFRC) beams reinforced with steel and glass fiber-reinforced polymer (GFRP) rebars. For this, micromechanics-based modeling was first carried out on the basis of single fiber pullout models considering inclination angle. Two different tension-softening curves (TSCs) with the assumptions of 2-dimensional (2-D) and 3-dimensional (3-D) random fiber orientations were obtained from the micromechanics-based modeling, and linear elastic compressive and tensile models before the occurrence of cracks were obtained from the mechanical tests and rule of mixture. Finite element analysis incorporating smeared crack model was used due to the multiple cracking behaviors of structural UHPFRC beams, and the characteristic length of two times the element width (or two times the average crack spacing at the peak load) was suggested as a result of parametric study. Analytical results showed that the assumption of 2-D random fiber orientation is appropriate to a non-reinforced UHPFRC beam, whereas the assumption of 3-D random fiber orientation is suitable for UHPFRC beams reinforced with steel and GFRP rebars due to disorder of fiber alignment from the internal reinforcements. The micromechanics-based finite element analysis also well predicted the serviceability deflections of UHPFRC beams with GFRP rebars and hybrid reinforcements.

3D Finite Element Analysis of Contact-less Power Supply with Linear Servo Motor

  • Woo, Kyung-Il;Park, Han-Seok;Park, Hyeong-Beom
    • Journal of Advanced Marine Engineering and Technology
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    • v.31 no.2
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    • pp.190-196
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    • 2007
  • This paper presents the 3D finite element analysis of the Contact-less Power Supply(CPS) with linear servo motor. The primary, secondary self and leakage inductances of the contact-less power supply and the capacitances of a resonant circuit are calculated by the finite element analysis using current source. The voltage source is used to do accurate analysis of the characteristics of the contact-less power supply. The CPS with the linear servo motor is proposed. The characteristics analysis of the contact-less power supply considering the linear servo motor is done.

Elastic-Plastic Finite Element Analysis of the Roll Forming Process for an Automotive Part of High Strength Steel (고강도강 자동차 부품의 롤 성형 공정의 탄소성 유한요소해석)

  • Kim K.H.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.10a
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    • pp.480-483
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    • 2005
  • A roll forming process is developed for an automotive part of high strength steel. Forming rolls are designed through the plane strain elastic-plastic finite element analysis to estimate the springback. It is assumed that the process can be approximated as a series of multi-step bending processes. Then the 3D elastic-plastic finite element analysis with the solid element is carried out for the designed roll forming process. The prototype roll forming machine and the forming rolls are made and the experiments are carried out. The results of the analysis and the experiments are compared.

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Finite Element Analysis for Die Compaction Process of Cemented Carbide Tool Parts (초경공구 성형을 위한 금형압축공정)

  • Hyun ChungMin;Kwon YoungSam;Chung SukHwan;Kim MyoungJin;Ha SangYul;Kim KiTae
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.28 no.8 s.227
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    • pp.1140-1151
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    • 2004
  • This paper reports on the finite elements analysis for die compaction process of cemented carbide tool parts. Experimental data were obtained under die compaction and triaxial compression with various loading conditions. The elastoplastic constitutive equations based on the yield function of Shima and Oyane were implemented into an explicit finite element program (ABAQUS/Explicit) and implicit finite element program (PMsolver/Compaction-3D) to simulate compaction response of cemented carbide powder during die compaction. For simulation of die compaction, the material parameters for Shima and Oyane model were obtained by uniaxial die compaction test. Explicit finite element results were compared with implicit results for cemented carbide powder.

A Study on Orbital Forming Analysis of Automotive Hub Bearing using the Explicit Finite Element Method (외연적 유한요소법을 이용한 자동차 Hub Bearing의 Orbital Forming해석에 관한 연구)

  • Cho, Hyun-Jik;Koo, Jeong-Seo;Bae, Won-Rak;Lim, Jong-Soon
    • Transactions of the Korean Society of Automotive Engineers
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    • v.16 no.1
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    • pp.29-36
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    • 2008
  • In this paper, the orbital forming analysis of an automotive hub bearing was studied to predict forming performances using the explicit finite element method. To find an efficient solution technique for the orbital forming, axisymmetric finite element models and 3D solid element models were solved and numerically compared. The time scaling and mass scaling techniques were introduced to reduce the excessive computational time caused by small element size in case of the explicit finite element method. It was found from the numerical simulations on the orbital forming that the axisymmetric element models showed the similar results to the 3D solid element models in forming loads whereas the deformations at the inner race of bearing were quite different. Finally the strains at the inner race of bearing and the forming forces to the peen were measured for the same product of the numerical model by test, and were compared with the 3D solid element results. It was founded that the test results were in good agreements with the numerical ones.