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Improvement of Fatigue-Proof Characteristics of Link Members Under Impact Loadings by a Spring-Actuated Mechanism  

안길영 (LG산전 전력연구소)
박상후 (계명대학교 기계자동차공학부)
이부윤 (계명대학교 기계자동차공학부)
김원진 (계명대학교 기계자동차공학부)
오일성 (LG산전 전력연구소)
Publication Information
Journal of the Korean Society for Precision Engineering / v.20, no.4, 2003 , pp. 158-164 More about this Journal
Abstract
The air circuit breaker (ACB) with the spring-actuated mechanism was studied to improve the fatigue-proof 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 b-link part of ACB was performed considering tile 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.
Keywords
Air Circuit Breaker; Spring-Actuated Mechanism; Low-cycle Fatigue; Maximum Tensile Stress; S-N curve;
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  • Reference
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