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스웨이징 행정에 따른 고압호스의 변형 특성에 관한 연구
김병탁(BYUNG-TAK KIM),김형제(HYUNG-JE KIM) 한국해양공학회 2003 韓國海洋工學會誌 Vol.17 No.4
The mechanical components with high-pressure hoses are generally produced by the swaging process. The hoses are composed of the rubber materials and the reinforced braids to support tensile forces. In case they are subjected to high mechanical and thermal loads under severe operating conditions, the oil in hoses can leak at the parts of small clamping forces. In this paper, the deformation characteristics of a fiber-reinforced hose are analyzed with respect to the jaw strokes using the finite element method. The manufacturing process is modeled with a contact problem in consideration of a real situation, and the material properties based on the experimental results are used in the analysis. Examinations of the relationship between the swaging strokes and the deformation behaviors of the hose were made on the basis of the stress and strain values of the hose components. The relations between clamping forces and separating forces are also proposed, in order to estimate clamping forces corresponding to separating forces for the given model.
Compliant Press-Fit Pin 결합에서 발생하는 응력분포특성에 대한 유한요소해석
김병탁(BYUNG-TAK KIM) 한국해양공학회 2000 韓國海洋工學會誌 Vol.14 No.4
Press-fit pin connection is the solderless interference-fit between pins and plated through holes(PTH) in the printed curcuit board(PCB). Because of not only its simple assembly and absence of problems associated with soldering, but also its good mechanical and electrical characteristics, the press-fit pin connection technology has quickly gained wide acceptance in the telecommunications and computer industries. In this paper, the contact stress characteristics of the domestic CPF pin when inserted into the rigid PTH was analyzed using the finite element method. The stress distributions, of the two different PTH diameters, according to the friction coefficients were compared and the stress variations of the compliant part of the pin, which have an influence on the performance, were displayed with the time and the arc length after complete connected. It is supposed that the results will provide useful data to improve the performance of the pin-PCB interconnection mechanism.
김병탁(Byung-Tak Kim),고성위(Sung-Wi Koh),김광희(Kwang-Heui Kim) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.3
Blast walls are integral structures at the typical offshore topside module to provide safety barriers for personnel and critical equipment against any blast loading and hydrocarbon explosions. The blast wall structures are usually configured with stainless steel. It can be referred as the good mechanical properties of the stainless steel against blast load, which features the characteristics of significant energy absorption and ductility. In this study, the proposed designs of corrugated panel are examined in order to determine the best design which satisfies the design criteria. The criteria on maximum deflection and stress are used to decide the best design. The effect of inclined angle of profile on deformation characteristics of blast wall is also performed. The numerical study was performed by using NX Nastran 7.5.