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과도한 운전하중을 받는 알루미늄 Hot Mill의 응력집중해석
변성우(Seong-Woo Byun),이영신(Young-Shin Lee),이현승(Hyun-Seung Lee),이세훈(Se-Hoon Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
The top spindle, end coupling and slipper metal are the important components of the hot rolling process and used for transmission of rotational power. In this study, the derivation of load condition is conducted for hot rolling process under slipper metal combination types and operation situations. The structural analysis is performed by applying mechanical characteristics, combination type, and rotational boundary condition of the top spindle, end coupling and slipper metal. The stress concentration of mill is analyzed. Optimal design is performed for contact surface between end coupling and slipper metal.
이제준(Je-Jun Lee),이영신(Young-Shin Lee),김재훈(Jae-Hoon Kim),변성우(Seong-Woo Byun),김현수(Hyun-Soo Kim),구송회(Song-hoe Koo),문순일(Soon-Il Moon) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
The combustor, diffuser and nozzle are main components of the ramjet engine. The objective of this study is thermo structure analysis of the combustor. The combustor is composed of 17-4 PH stainless steel housing and Inconel 718 liner. Temperature conditions of housing and liner are quite different. The combustor liner is rapidly heated up to 700℃, so that is reached plastic zone locally. The temperature of combustor housing rises to 400℃. The thermal stress of liner is large than housing stress. The nonlinear thermal analysis with mechanical properties of both housing steel and liner inconel such as Young’s modulus, thermal expansion coefficient and thermal conductivity is conducted. The analysis of the transient temperature and thermal stress of combustor is carried out the finite element method with code Nastran. The structural assessment of combustor is evaluated.