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양영수(Y.-S. Yang) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.5_2
Since the ceramic materials onto cylinder surface could enhance the thermal efficiency of engines and increases the service life the cylinder, the plasma sprayed ceramic coating have been used in the cylinder bore coating technology. It is widely appreciated that the coating properties are strongly affected by residual stresses. The residual stresses distribution resulting from all these processes depend on the relative values of each phenomenon, some of which are strongly temperature dependent. In this study finite element stress analysis wcre carried out to predict the residual stresses distribution in the plasma sprayed coatings with the variations of substrate preheating temperature for the application to the cylinder bore in aluminum engine.
김재연(J. Y. Kim),양영수(Y. S. Yang),김기운(K. W. Kim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
Tire belt durability is characterized by the initiation of a crack at the belt edge region, and the propagation of the crack until the ply is separated. Experimental methods have been used to analysis of the belt durability in the cord-reinforced rubber composite tires, but it takes much cost and time to make experiments. In this paper, a finite element method to analyze the fatigue life of a crack at the belt edge of tires is presented. The fatigue life is analyzed by using a three-dimensional Finite Element Modeling. This method includes a global-local finite element analysis to provide the detail necessary to model explicitly an internal crack and use of the J-integral for energy release rate evaluation.