http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
디커플러조립체 로하셀 폼 팽창에 따른 연성 PCB 변형량 예측에 관한 연구
윤의열(Eui-Youl Yoon),이공희(Gong-Hee Lee),전희호(Hee-Ho Jeon),이승준(Seung-Joon Lee) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
Generally, DeCoupler Assembly for Millitary 3D Array Antenna is fabricated by adhesive bonding and Removes coupling Signals between the Single Array Antennas in the arbitrary Space. When It is located in the arbitrary Space, Volume Expansion of Rohacell form is occur caused by surrounding Air Temperature and Humidity. and then Antenna Performance is degraded by influence of Volume Change. In this Study, The Structural Simulation is perfomed to analyze Deformation of Flexible PCB by using Finite Element Method. For reduce Analysis Time, A quarter model of the D-Coupler Assembly is used. UGNX program is used for 3D shape modeling and ANSYSWORKBENCH V14.5 is used for Structural Analysis.
리플로 솔더링 과정 열-구조 연성 해석을 통한 PCB 불량 예측에 대한 연구
윤의열(Eui-Youl Yoon),김승우(Seung-Woo Kim),양윤석(Yun-Suk Yang),이승준(Seung-Joon Lee),이공희(Gong-Hee Lee) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
In order to prevent bad soldering of PCBs(Printed Circuit Board) assembly during Reflow Soldering Process. Thermal Structure coupled simulation is perfomed about Forced convection reflow soldering process with air injection for PCB Components which have different material properties. In this study, Simulation result predicted failure mode and location caused by material mismatch and compared with experimental result. Simulation is perfomed using ANSYS WORKBENCH.
윤의열(Eui-Youl Yoon),김정(Jeong Kim),강범수(Beom-Soo Kang) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
The purpose of this paper is to develop web-based simulation system which can be used anytime, anywhere without expensive hardware and software. In this paper, a web-based simulation system was developed by utilizing finite element analysis and client/server system using visual C++ language. The client/server system consist of two modules, post-processor module, management system module. The input data for FEM calculation is transferred to the management system. After that, the result from the simulation can be visualized through the post-processor module. By using this system, small industries and individuals can considerably save the time and expense
윤의열(Eui-Youl Yoon),전희호(Hee-Ho Jeon),이승준(Seung-Joon Lee) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Most of the Military Radar have several kind of Radomes to protect the Antenna and Electric Equipment. The Radome is made with composite materials to get the light weight and high mechanical strength. Recently, The surface damage problems associated with Hailstone Impact on aircraft or Military Equipment during flight and operating condition become an important issue. Hailstone impact is dangerous not only for the direct damages but also for the hidden damages which may cause more serious problems. There are many research which is focus on the aircraft damages under hailstone impact but few research have been studied for the military radome panel. In this paper, We studied the hailstone impact on Composite Radome Panel which has sandwich structure with Finite Element Analysis. To better understand hailstone impact, the ANSYS LS-DYNA explicit dynamics code was employed to simulate hailstone impact. A Smooth Particle Hydrodynamics approach(SPH) was chosen to represent the hailstone geometry. We studied the strength variation of the radome panel under the different sizes and speeds of hailstone.
유한요소해석을 통한 실리콘 가스켓 최적형상 설계 방안에 대한 연구
윤의열(Eui-Youl Yoon),이공희(Gong-Hee Lee),전희호(Hee-Ho Jeon) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
In this study, We studied Silicon Gasket Design Method using a commercial finite element program ANSYS WORKBENCH. In the numerical analysis, the silicon gasket is assumed to have the properties of the geometric and material nonlinearity and incompressibility. Mooney-Revlin hyper-elastic model is used to consider incompressibility. Three types of Hollow O-Strip silicon gasket 2D FE models are developed to simulate the deformation and Contact Results between Cover and Housing Groove which is fixed width and depth. Finally, We compared each simulation results and proposed most profitable Geometry of silicon gasket
윤의열(Eui-Youl Yoon),전희호(Hee-Ho Jeon),이승준(Seung-Joon Lee) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
Military Equipment is equipped with electronic Device in the console cabinet to ensure safety in various environments such as vibration and shock. and Generally, it is common practice to fabricate multiple samples and test them for reliability. Major disadvantages of this development process are waste of time and excessive Failure Expense. To overcome these disadvantages, we use finite element analysis method. In this paper, We studied Structural Safety of the SSPA(Solid State Power Amplifier) Device which is installed in 19“ standard rack with finite element analysis. To save Pre-processing and Post-processing time, the ANSYS WORKBENCH was employed to simulate SSPA. Simplified structural analysis was performed to verify the simulation FE model. Vibration analysis is performed according to the MIL-STD-167-1A and Shock analysis is performed to investigate the effect of a 20g for 2ms load applied in three axes based on the procedures given in MIL-STD-810F.
대형용접구조물의 미세틈새가 구조 건전성에 미치는 영향성에 관한 연구
윤의열(Eui-Youl Yoon),이공희(Gong-Hee Lee),김창진(Chang-Jin Kim),전희호(Hee-Ho Jeon),이승준(Seung-Jun Lee) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
During the welding process, welding deformation is caused by the non-uniformity of the temperature distribution in the weldment. the geometrical shape of a Welding bead, Welding deformation and Gap have strong influence on the mechanical reliability such as fracture strength and fatigue life against large welding structure . In this study, Finite element analysis was used to figure out the Structural integrity correlation of the large welded structures caused by small gap. Based on the simulation results, small gap around welding conjunction has influence on structrual integrity. In conclusion, it was recommended that welding structure design be perfomed according to the proper welding procedure and considered minimizing small gap near the welding metal conjuction.
윤의열(Eui-Youl Yoon),양윤석(Yun-Suk Yang),전희호(Hee-Ho Jeon) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
In this Study, the structural & Fatigue analysis has been conducted for the air compressor's Cylinder Fixing Screw. A purpose of this study is to look into a structural strength and safety factor at severe loading condition which is not intended and to compare original screw(1/4 UNC, Strength Grade2) with the recommended screw(M8, Strength grade 12.9). SolidWorks program is used for 3D shape modeling and ANSYSWORKBENCH V12.1 is used for Strength and Fatigue Analysis. To acquire the severe loading condition, Vibration and Pressure measurement test performed at bad alignment aircompressor.
폴리우레아 코팅이 알루미늄 평판의 충격에너지 흡수에 미치는 영향성 분석
김창진(Changjin Kim),윤의열(Eui-Youl Yoon),이진규(Jinkyu Lee),정상준(Sangjun Jung),김기진(Gijin Kim) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Polyurea is an elastomeric material with a very fast curing rate and has excellent physical properties such as tensile strength and durability compared to other polymer materials. Because the superelastic properties of polyurea serve to absorb impact energy, it is being studied and used as a protective coating to improve resistance to penetration and perforation against impact energy such as explosion and ballistic impact. Polyurea has excellent adhesion to metal and non-metal materials, and can be easily applied by spraying on the outer surface of the structure, so it is highly useful in terms of securing structural strength in the defense industry. In this study, using a specimen coated with polyurea on an aluminum plate, a test was performed to compare the kinetic energy absorption against the impact load, and a finite element analysis was performed. Polyurea (Paxcon PX-3350) coating was applied An aluminum (A6061-T6) specimen was produced and the impact test was performed using a drop impact tester (CEAST9350, INSTRON). Based on the test results, it was compared with the finite element analysis results through ANSYS EXPLICIT.
최원삼(Won Sam Choi),윤의열(Eui-Youl Yoon) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11
In the case of a radome manufactured by dissimilar materials, the problem of dropping of the adhesion frequently occurs when operating in a harsh environment for a long time. This paper presents some considerations in the design of radome for dissimilar materials that operate in harsh environments. First, the cause was analyzed through the identification, M & S, and experimental verification of the probable cause of the crack of the radome adhesion. After that, the improvement effect was confirmed through the verification test after establishing the complement of the cause.