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고성위(Sung-Wi Koh),김병탁(Byung-Tak Kim) 한국기계가공학회 2008 한국기계가공학회 춘추계학술대회 논문집 Vol.2008 No.-
The hydrostatic slipper bearing is generally used in heavy equipments to support the load generated from two surfaces which are sliding relatively at low speed. The object of the bearing is to remove the possibility of direct contact by maintenance of an adequate oil film thickness between two metal surfaces. Because the bearing performance is influenced by the bearing deformation, it is highly dependent on the injection pressure, the bearing surface profile and so on. In this study, the performance of a hydrostatic slipper bearing is investigated according to the injection pressure by the finite element analysis. In the analysis, the special boundary condition to take the fluid-structure interaction(FSI) into account is used on the interactive surface. The results, such as bearing deformation, stress and lifting force, obtained from the fully coupled analysis are compared with those from the single step sequential method.
고성위(Sung Wi Koh),김형진(Hyung Jin Kim),김재동(Jae Dong Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
The effect of load, sliding speed and particle on friction and wear behaviors of side plate materials of FRP ship, which were composed of glass fiber and unsaturated polyester resin(GF/PE composites), were investigated. Friction coefficients of GF/PE composites were increased as sliding speed increase in the wear test. The particle has a significant effect on the friction coefficient under low load, whereas it had no effect on the coefficient when load was high. It could be verified by SEM photograph of fracture surface that major failure mechanisms were microfracture, deformation of resin cutting and cracking.