Crankshaft is one of the most important moving parts in internal combustion engine. In order to design more lighter and compacter crankshaft, strength and durability analysis is significant in evaluating the engine performance and lifetime as well as overall mechanical information. In this paper, structural analysis is performed to obtain the stress amplitudes and mean stresses at critical locations of crankshaft over the engine rotational speed. The load magnitudes are calculated by considering the firing pressure, inertia force, and torsional load. Next. using the stress results and the fatigue properties of the material, durability analysis is done to calculate the fatigue safety factors. As a result, the critical areas of the crankshaft were crank pin and journal’s fillet areas, and their safety factors satisfied the analytical criteria at all rotational speed by considering the fillet rolling effect.
목차
ABSTRACT 1. 서론 2. 크랭크축의 작용력 2.1 실린더 내의 압력에 의한 작용력 2.2 관성에 의한 힘과 모우멘트 3. 크랭크축 적용 예 3.1 엔진 회전속도에 따른 크랭크축 하중 3.2 유한요소 모델 3.3 유한요소 해석결과 3.4 피로안전계수 산출 4. 결론 References
키워드
Crankshaft(크랭크축)Stress Amplitude(응력진폭)Mean Stress(평균응력)Fillet Rolling Effect(필렛롤링효과)Fatigue Safety Factor(피로안전계수)Finite Element Analysis(유한요소해석)
저자
최복록 [ B. L. CHOI | Member, Gangneung-Wonju National University School of Mechanical & Automotive Engineering ]
Corresponding author