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대형트럭 리프 스프링 단품 다축리그 시험모드 개발과 유한요소 모델을 이용한 다축내구 해석의 연구
최정헌(JungHun Choi),유승원(Seungwon Yoo),김현남(Hyunnam Kim) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
The leaf spring is one of the most important parts of the vehicle because the damage of the leaf spring leads to lifethreatening accidents. In general, the most typical method of leaf spring durability test that is conducted by manufacturers of leaf spring is vertical load durability test in test lab. However, the leaf spring which has satisfied the target life of the vertical load durability test in test lab couldn"t satisfy the target life of the real vehicle durability test. Therefore, the aim of this study is to develop the Multi-axial Durability Test Mode which is consist of simple sine waves and damage the leaf spring as the same level with the real vehicle durability test in accelerated durability test road. And then, it presents the Multi-axial Fatigue Analysis Method by using Finite Element Model which is validated with the Multi-axial load test result and the Multi-axial Durability Test mode.
4차산업시대에 상담코칭전문가의 인식에 관한 현상학적 연구
최정헌 ( Junghun Choi ) 한국지식경영학회 2018 지식경영연구 Vol.19 No.3
The purpose of this study is to help Counseling & Coaching(C&C) service and marketing by understanding C&C professionals' perception about the fourth industrial age. The qualitative research method of phenomenology was utilized in this study. In-depth personal interviews of 5 C&C Specialist with more than 10 years of experience in the C&C service setting were conducted using the records from May, 2018 to July, 2018. Content analysis was done using the Colaizzi’ phenomenological method. The results based on the data analysis, 20 descriptive statements and 5 themes were confirmed. The 5 themes were as followed; ‘A growing interest’, ‘Psychological burden of change’ ‘New hope through convergence’, ‘Do not move to action’, and ‘Think about new strategies’. This study helps to recognize counseling coaching professionals who are preparing for the fourth industrial age. The results can be used as a starting point for identifying the knowledge ecosystem and activating the counseling coaching service in the fourth industrial age.