• Title/Summary/Keyword: Angular deformation

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Analysis of Induction Heating by Using FEM (유한요소법을 이용한 유도가열 해석)

  • 윤진오;양영수
    • Proceedings of the KWS Conference
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    • 2004.05a
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    • pp.66-68
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    • 2004
  • Induction heating is a process that is accompanied with magnetic and thermal situation. When the high-frequency current flows in the coil, induced eddy current generates heat to conductor. To simulate an induction heating process, the finite element analysis program was developed. A coupling method between the magnetic and thermal routines was developed. In the process of magnetic analysis and thermal analysis, magnetic material properties and thermal material properties depending on temperature are taken into consideration. In this paper, to predict the angular deformation, temperature difference and the shape of heat affected zone were discussed. Also appropriate coil shape for maximum angular deformation were proposed.

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A Study on the Deformation of the Moving Pressure Plate in a Balanced Type Vane Pump (압력 평형형 베인 펌프의 가동 압력판 변형에 관한 연구)

  • 한동철;조명래;박신희;최상현
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 1998.04a
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    • pp.277-285
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    • 1998
  • This paper presents the deformation characteristics of the moving pressure plate in a balanced type vane pump that widely used automotive power steering systems. Moving pressure plate can control the clearance between rotor and plate in accordance with load pressure variation; it always guarantees that pump to have optimal volumetric efficiency. In this paper, firstly, we calculate the acting force on the pressure plate, which is used to determine the angular position and load condition for analyzing the deformation of pressure plate. Secondary, finite element method is used for the deformation analysis. As results of acting force analysis, it is found that maximum difference of forces occurs at angular position 28$\circ$ from the small arc center of cam ring and load pressure is a dominant factor to affect acting force variation. The deformation of pressure plate increases as load pressure increases. At high load pressure, the deformation of pressure plate becomes larger than the initial clearance between rotor and plate. Therefore, it is required to design the plate for controlling the deformation.

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Development of Deformation Predicting Model for Line Heating of Steel Plates (강판의 선상가열시 변형량 예측모델의 개발)

  • Lim, Dong-Yong;Lee, Joo-Sung
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2003.10a
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    • pp.121-126
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    • 2003
  • This paper is concerns with the development of the formulae to predict deformation of curved plate due to line heating. For this purpose thermal elasto-plastic analysis has been carried out for both flat and curved plate models with varying parameters which affect the result of line heating. based on the results of numerical analysis, the formulae for predicting angular deformation has been derived through the regression analysis, which. It has been seen that the present model well agrees with the numerical analysis results and can reflect the curvature effect of plate to be heated. This paper ends with some comments on this formulae.

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Superplastic Deformation Behavior of a Zn-0.3Wt%Al Alloy Fabricated by ECAP (ECAP 가공한 Zn-0.3Wt%Al 합금의 초소성 변형 특성)

  • Ha, T.K.;Jung, J.Y.;Kim, K.J.;Na, K.H.
    • Transactions of Materials Processing
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    • v.18 no.6
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    • pp.448-452
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    • 2009
  • Superplastic deformation behavior and texture evolution after equal channel angular pressing (ECAP) of Zn-0.3Wt%Al alloy were investigated in this study. ECAP was conducted at temperatures from $60^{\circ}C$ to $160^{\circ}C$ on the plate type specimens of 5 mm thickness and 20 mm width. The specimens obtained by ECAP showed typical texture with basal poles tilted away from the ND toward ED, which is called shear texture. Tensile tests were carried out at $100^{\circ}C$ for ECAPed specimens under the strain rate of 0.0002/s. After ECAP of the Zn-0.3Wt%Al alloy, elongation was dramatically increased up to 500% at $100^{\circ}C$. The effect of ECAP on the anisotropy in the superplastic deformation behavior was negligible.

Development of Deformation Predicting Model for Line Heating of Steel Plates (강판의 선상가열시 변형량 예측 모델의 개발)

  • Lim Dong-yong;Lee Joo-sung
    • Special Issue of the Society of Naval Architects of Korea
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    • 2005.06a
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    • pp.177-184
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    • 2005
  • This paper is concerns with the development of the formulae to predict deformation of curved plate due to line heating. For this purpose thermal elasto-plastic analysis has been carried out for both flat and curved plate models with varying parameters which affect the result of line heating. based on the results of numerical analysis, the formulae for predicting angular deformation has been derived through the regression analysis, which. It has been seen that the present model well agrees with the numerical analysis results and can reflect the curvature effect of plate to be heated. This paper ends with some comments on this formulae.

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Effects of Inductor Shape in Steel Forming Process with High Frequency Induction Heating (유도가열을 이용한 강판성형공정에서 유도코일 형상의 효과)

  • Yang, Young-Soo;Bae, Kang-Yul;Shin, Hee-Yun
    • Journal of Welding and Joining
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    • v.26 no.4
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    • pp.66-72
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    • 2008
  • Because of high intensity and easy controllability of the heat source, high frequency induction heating has been concerned and studied for the steel forming process in the ship building industry. However, the heating and forming characteristics have to be further properly modelled and analyzed for the process to be utilized with its optimal working parameters. In this study, a modelling with thermo-elasto-plastic analysis is performed using the FEM to study heat flow and deformation of the steel plate during the forming process with the electro-magnetic induction heating. The numerical model is then used to study the effect of the inductor shape on the magnitude of angular deformation of the plate during the forming process. It is revealed that the square shape of inductor induces the largest deformation among the rectangular inductors.

Formability of ECAPed Al Alloy Sheet (ECAP 한 알루미늄 판재의 성형성 연구)

  • Akramov, Saidmurod;Kim, In-Soo;Lee, Min-Gu;Park, Byung-Hyun
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2006.06a
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    • pp.88-91
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    • 2006
  • Ultra-fine grained and high hardened Al sheet was obtained by Equal Channel Angular Pressing (ECAP). During this process the microstructure, the hardness and the texture of AA 1050 Al alloy sheet are changed by a severe shear deformation. The plastic strain ratio after the ECAP and subsequent heat-treatment condition was investigated in this study. It was found that the average r-value of the equal channel angular pressed and subsequent heat-treated specimen was 1.7 times higher than that of the initial Al sheet. This could be attributed to the various texture formations through the ECAP and subsequent heat-treatment of AA 1050 Aluminum alloy sheets.

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Carbon Nanotube Reinforced Metal Matrix Nanocomposites via Equal Channel Angular Pressing

  • Quang, Pham;Jeong, Young-Gi;Yoon, Seung-Chae;Hong, Sun-Ig;Hong, Soon-Hyung;Kim, Hyoung-Seop
    • Proceedings of the Korean Powder Metallurgy Institute Conference
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    • 2006.09b
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    • pp.980-981
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    • 2006
  • In this study, bottom-up type powder processing and top-down type SPD (severe plastic deformation) approaches were combined in order to achieve full density of Carbon nanotube (CNT)/metal matrix composites with superior mechanical properties by improved particle bonding and least grain growth, which were considered as a bottle neck of the bottom-up method using the conventional powder metallurgy of compaction and sintering. ECAP (equal channel angular pressing), the most promising method in SPD, was used for the CNT/Cu powder consolidation. The powder ECAP processing with 1, 2, 4 and 8 route C passes was conducted at room temperature.

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Three Dimensional Finite Element Analysis of the Deformation Behavior of pure-Zr during Equal Channel Angular Pressing (등통로각압축(ECAP)공정에서 순수 지르코늄의 변형거동에 대한 3차원 유한요소 해석)

  • Lee, Kang-Moo;Kwon, Gi-Hwan;Kwun, Sook-In;Kim, Myung-Ho;Hwang, Sun-Keun;Chae, Soo-Won
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.27 no.9
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    • pp.1539-1545
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    • 2003
  • A lot of researches have been performed on the equal channel angular pressing (ECAP) which produces ultra-fine grains. Along with the experiments, the finite element method has been widely employed to investigate the deformation behavior of specimen during ECAP and the effects of process parameters of ECAP. In this paper, pure-Zirconium is considered for ECAP process by using three-dimensional finite element analysis. The results have been compared with those of previous two-dimensional analysis and with the experimental results

Determination of Mechanical Properties of Equal Channel Angular Pressed Aluminum Alloys in Nano-surface Region (나노표면 영역에서의 ECAP 변형된 알루미늄합금의 기계적 물성변화 측정)

  • An, SeongBin;Kim, ChungSeok
    • Journal of the Korean Society for Heat Treatment
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    • v.32 no.3
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    • pp.113-117
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    • 2019
  • The effects of severe plastic deformation and heat treatment on the mechanical properties of Al 5052 and 6005 alloys were investigated using the metallurgical technique and nano-indentation technique in nano-surface region. Equal channel angular pressing (ECAP) was used to apply severe plastic deformation to the aluminum alloys in order to obtain fine grain sized materials. The elastic modulus was measured and interpreted in relation to the metallurgical observation. The elastic modulus increased after ECAP process due to evolution of the fine grains. However, the elastic modulus decreased after heat treatment due to generation of coarsened precipitates on the grain boundaries.