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스프링구동 메커니즘의 충격 하중을 받는 링크부재의 내피로 특성 향상
박상후(Sang-Hu Park),이부윤(Boo-Youn Lee),김원진(Won-Jin Kim),안길영(Kil-Young Ahn),오일성(II-Sung Oh) 한국자동차공학회 2002 한국자동차공학회 지부 학술대회 논문집 Vol.2002 No.9
The air circuit breaker (ACB) with the spring-actuated mechanism was studied to improve the fatigue-proof<br/> characteristics of its link. The low-cycle fatigue fracture phenomenon occurred on the critical link, called h-link, of ACB from the repeated rapid closing and opening operations. To analyze the cause of failure, dynamic FE-analysis on the h-link part of ACB was performed considering the velocity and acceleration of the links per time as boundary conditions, which were obtained by using ADAMS. Also, the S-N curve obtained by experiments was used to investigate requirement on the fatigue-proof characteristics. Then, to reduce the maximum tensile stress on the h-link, three types of h-link were examined and one of them was selected.