자전거 페달에 대한 구조 및 피로 해석

Abstract

AbstractThis study investigates structural and fatigue analyses at bicycle pedal. Maximum deformation at model 1 is 2 times as much as model 2 at static analysis. Models 1 and 2 have the possibility of the weakest strength at the part of contact with chain gear. Among the cases of nonuniform fatigue loads at Models 1 and 2, ‘SAE bracket history’ with the severest change of load becomes most unstable but ‘Sample history’ becomes most stable. In case of ‘Sample history’ with the average stress of 0 to -10 4 MPa and the amplitude stress of 0 to 10 4 MPa, the possibility of maximum damage becomes 4%. This stress state can be shown with 5 to 7 times more than the damage possibility of ‘SAE bracket history’ or ‘SAE transmission’. The analysis result of this study can be effectively utilized with the safe design of pedal. Key Words : Pedal(페달), Nonuniform fatigue loads(불규칙 피로 하중들 ), Fatigue life(피로수명), Fatigue damage(피로 손상), Damage frequency(손상 빈도수) 1. 서 론 자전거 페달은 체인기어, 체인과 함께 사람의 다리로 인한 구동력을 바퀴에 회전력으로 전환시켜 주는 자전거의 중요 부품이다. 자전거를 구동시키기 위해 직접적으로 힘이 닿는 곳이기 때문에 기계적 응력, 변형