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http://dx.doi.org/10.14346/JKOSOS.2018.33.6.1

Prediction of Remaining Life Time and Determination of Inspection Cycle Considering Critical Crack in Tension Bar of Continuous Ship Unloader  

Park, S. (Department of Mechanical Engineering, Sungkyunkwan University)
Chung, J.Y. (Department of Mechanical Engineering, Changwon National University)
Song, J.I. (Department of Mechanical Engineering, Changwon National University)
Kim, D.J. (Department of Mechanical Engineering, Andong National University)
Seok, Chang Sung (Department of Mechanical Engineering, Sungkyunkwan University)
Publication Information
Journal of the Korean Society of Safety / v.33, no.6, 2018 , pp. 1-7 More about this Journal
Abstract
The Continuous Ship Unloader (CSU) is an equipment that unloads freight from the ship docked in the port to the land. And the design target life time is designed to be 30 to 50 years, and it is classified as a semi-permanent large facility. However, cracks may occur due to structural defects, abnormal loads, and corrosion, and fatigue failure may occur before the design life is reached. In this study, we predicted the remaining life time of the main component of the CSU considering crack. And also proposed inspection cycle for maintenance of CSU based on the results of the remaining life time prediction. For this purpose, the structure, operational stresses of the CSU were analyzed and main members were selected. And tensile tests and fatigue crack propagation tests were performed with SM490YA and SM570TMC, which are used as main materials for CSU.
Keywords
crack propagation; continuous ship unloader; fatigue life;
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