재질의 비선형 특성을 고려한 엔진 복합 구조물의 내구성능 평가

다국어 초록 (Multilingual Abstract)

Recently, the automotive industry has been trying to reduce the weight of vehicles to improve the fuel efficiency and comply with stricter environmental regulations. It is important not only to reduce weight but also to maintain durability of the original product. Durability problems of the engine, which accounts for major portion of the weight of a vehicle, were found out by using CAE(Computer Aided Engineering) method in this study. By using finite element analysis which is one of the CAE methods in this study, durability of the reduced weight engine was estimated after structural analysis was performed. No studies on structural analysis of material properties on temperature changes in the engine have ever been reported to date. In this study, the FE model including the cylinder block and cylinder head with a gasket, head bolts, liners and valve seats was constructed and structural analysis considering plastic deformation was performed using data obtained from material properties test in high temperature. Through the analysis results in assembly, thermal and firing load condition, we predicted stress concentration in the engine assembly. Based on the result of FE analysis, the weak parts of the engine assembly were estimated at the position where bolts are fastened and through the shafts of bolts.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 고온 인장 실험
• 3. 엔진 어셈블리
• 4. 유한 요소 해석
• 5. 해석 결과
• 6. 결론
• 참고문헌