• Computational Structural Engineering
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• v.15 no.1
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• pp.95-103
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• 2002

• Journal of the Computational Structural Engineering Institute of Korea
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• v.26 no.3
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• pp.199-205
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• 2013

In this study, the methodology for the fatigue life prediction using finite element method(FEM) in wire, bundle and assembly level of the wire harness system and the development of the fatigue life test machine for the numerical analysis are investigated. To obtain stress-life(S-N) histories of the componential wires of the system, five kinds of wires are prepared and applied to the repeated bending motion using developed fatigue life test equipment. Equivalent model of the wire from the rule of mixtures theory is used for the material modeling of sheath and wire core combination. Contact conditions among the wires, taping conditions are established through the bundle level test and numerical bundle analysis. Wire and bundle level results are adopted for the assembly level analysis. For the assembly level analysis, real wire harness system including bundle and grommet is numerically modeled and applied contact condition between wires with real opening motion. The fatigue life more than 700,000 cycles of the assembly is obtained from the FEM, and it is confirmed that the result has good agreement with the experimental result.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.35 no.12
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• pp.1557-1562
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• 2011

In order to assess the stiffness of bearing screw used for lead screw, finite element analysis on stress and fatigue life of bearing screw has been performed. Based on these analysis, fatigue life dominant model of bearing screw was proposed. This improved model introduces a fillet to release the concentrated stress generated in the vicinity of bearing screw hole. This paper also considered the strength suitability when the bearing screw manufactured in W company was applied to X-ray CT.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.18 no.4 s.70
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• pp.427-434
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• 2005

In this study, to develop composite bridge deck of many advantages such as light weight, high strength, corrosion resistance and high durability, profile design, laminate design and finite element analysis were carried out. In the analysis, 5-girder single span bridge with composite deck was considered. Deflection serviceability, failure criteria and web buckling were evaluated. Composite deck of designed profile was fabricated with pultrusion process. The coupon tests were conducted for the fabricated deck and the results were described.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.21 no.5
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• pp.459-464
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• 2008

While high speed / precision investigating for maximization of Textile Machinery business is requesting a machine which has highly endurance, stability and reliance abilities following customer request. In this research, load volume that gives influence on loom is measured and analyzed for water jet loom in real operation time to driving system adhered torque sensor to each a module. As well, measurement and analysis technology are developed about torque and vibration of driving systems for textile machinery by comparing dynamical analysis of water jet loom with gained result, basic materials about development of high value added textile machinery which has endurance and stability are presented.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.04b
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• pp.510-514
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• 1995

설계 초기 단계에서 자동차 샤시 부품의 내구강도를 평가하는 것은 대단히 중요하므로 실제 전산수치해석을 통하여 예측도 행하고 있지만 양산 적용여부는 차량제작 후 실차 내구시험을 시행 후 결정되고 있다. 본 연구에서는 컴퓨터의 잇점을 적극 활용하여, 차량의 주요부품인 Lower Arm과 Rear Axle Housing 등의 내구시험에서 부품의 변형을 탐지하기 위한 자동 측정 프로그램을 개발하고자 한다. 사용한 프로그램은 IBM-PC 호환기종(80286, 80386, 80486)에 사용되는 Turbo-C 언어를, 한글입력을 위해서 한글 라이브러리 <한>을 사용하였다. 그리고사용자가 임의로 시스템 각 요소의 모듈(module)을 대치할 수 있도록 각 함수별로 서브루틴(subroutine)화 하였다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.33 no.4
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• pp.209-216
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• 2020

In this paper, parametric structural analysis is presented utilizing the co-rotational(CR) shell analysis utilizing EDISON. CR shell analysis shows faster convergence than the commercial software, NASTRAN, does. The 1st natural frequency of the rear frame is obtained, which is close to that of the engine during high speed cruise. Three cases under two design variables are presented and analyzed. Gusset is shown to be more effective among those which feature the same weight change. The results presented in this paper will be applicable for further researches to improve the durability of a motorcycle rear frame.

• Computational Structural Engineering
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• v.7 no.4
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• pp.119-126
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• 1994

One of the most serious promblems in the concrete structures is cracking failure due to the several complicated reasons. These cracks are not only serious structural problems, but also lower the durability and deteriorate the structural shape, which cause the reinforcement rust in the open air and sea water. An analytical study was undertaken to investigate the cracking problems in the one of concrete caissons using Finite Element Method. This caisson is modelled with plate elements and truss elements for the walls and lifting cables respectively and analyzed in the every construction stages, such as lifting, moving, sinking, filling, towing, setting, and proposed reasonable construction methods for the concrete caisson structures.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.276-279
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• 2010

유리섬유 복합소재 바닥판은 고강도, 경량 그리고 고내구성을 가지고 있으므로, 현재 국내 및 해외에서 교량에 꾸준히 적용되고 있다. 국내외에서 기존에 사용하고 있는 복합소재 데크는 주로 수평방향의 암수접착을 통한 결합을 실시하고 있으나 본 연구진에 의해 획기적인 착탈결합방식 연결이 가능한 복합소재데크를 개발하였다. 복합소재 적층설계를 통해 설계된 복합소재 데크의 물성치를 ESAComp에 의한 적층해석과 시편시험을 통해 추정하였다.

• Journal of Navigation and Port Research
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• v.33 no.3
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• pp.215-220
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• 2009

Container cranes are vulnerable structure to difficult weather conditions bemuse there is no shielding facility to protect them from strong wind. This study was carried out to analyze the effect of wind load on the structure of a container crane according to the change of the boom shape using wind tunnel test and computation fluid dynamics. And we provide a container crane designer with data which am be used in a wind resistance design of a container crane assuming that a wind load 75m/s wind velocity is applied in a container crane. In this study, we applied mean wind load conformed to 'Design Criteria of Wind Load' in 'Load Criteria of Building Structures' and an external fluid field was divided as interval of 10 degrees to analyze the effect according to a wind direction. In this conditions, we carried out the wind tunnel test and the computation fluid dynamic analysis and than we analyzed the wind load which was needed to design the container crane.