Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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The Analysis of Collapse Load of Thick Pressure Cylinder under External Hydrostatic Pressure

외압을 받는 두꺼운 원통형 내압용기의 붕괴하중 해석

  • Lee, Jae-Hwan (Naval Architecture and Ocean Engineering, Chungnam National University) ;
  • Park, Byoungjae (Korea Research Institute of Ships and Ocean Engineering (KRISO))
  • 이재환 (충남대학교 선박해양공학과) ;
  • 박병재 (한국해양과학기술원 부설 선박해양플랜트연구소)
  • Received : 2018.09.28
  • Accepted : 2018.12.14
  • Published : 2019.04.20
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Abstract

Number of studies on the buckling of thin cylindrical pressure vessels, such as submarine pressure hull and pipe with a large ratio of diameter/thickness, have been carried out in the naval and ocean engineering. However, research about thick cylinder pressure vessel has not been active except for the specific application in nuclear area. There are not many papers for the estimation of buckling and ultimate load capacity of thick cylinders for the deep sea usage. Thus, it is important to understand the theoretical bases of the buckling and collapse process and the derivation process of such loads for the proper design and structural analysis. The objective of this study is to survey the collapse behavior, to analyse and clarify the derivation procedure and to estimate the ultimate collapse load for thick cylinder by analyzing relevant books and papers. It is found that the yielding begins at the internal surface of the thick cylinder and plasticity develops from the internal surface to the external surface to generate collapse. Also the initial imperfection of cylinder develops flattening and consequently accelerates buckling and finally ultimate collapse. By comparing the collapse loads of aluminum thick cylinder by applying equations herein, it is shown that the equations analyzed are appropriate to obtain collapse load for thick cylinder.

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References

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