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문희욱(Hee Wook Moon),김영은(Young Eun Kim) Korean Society for Precision Engineering 2006 한국정밀공학회지 Vol.23 No.6
To investigate the bone remodeling phenomenon around implant device, 3-D mathematical simulation model was developed. Strain energy density from the finite element method was chosen for the indicator for remodeling process. Recursive calculations continued until converged results between FEM and mathematical model. For a osteo-integration example, bone-remodeling process in a implanted tibia of beagle was adapted. Calculated results indicated that the bone densities around screw pitch were increased which indicates firm fixations between the bone and implant. Screw design parameters have an influence on initial stability of the implant rather than remodeling process.
엔진 커넥팅로드 Shank 부의 경량화를 위한 좌굴 민감도 분석
이영민(Young Min Lee),이문규(Moon Kyu Lee),문희욱(Hee Wook Moon),신성원(Sung Won Shin),장훈(Hoon Jang),이형일(Hyungyil Lee),이태수(Tae Soo Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Connecting rod under incessant dynamic motion has a major effect on the engine performance according to its lightweight degree. In engine parts design, the effect of buckling has been considered less than static load and fatigue, and there were limited studies that compared the effect of those three factors. The purpose of this study is to analyze the sensitivity of buckling by comparing the safety factors for static stress, fatigue and buckling with respected to the change of section area of the connecting rod shank. Static stress, fatigue and buckling analysis are performed by FE model which has width and thickness as design variables, and buckling sensitivity with the change of the cross sectional area in shank is analyzed by comparing the safety factor decreasing ratio. Sensitivity analysis demonstrated that the effect of buckling needs to be considered in designing the connecting rod, and reducing the width can be more profitable than reducing the thickness of the shank.