[2009] CRUSHING BEHAVIOUR OF STEEL PLATED STRUCTURES IN COLD TEMPERATURE: EXPERIMENTAL AND NUMERICAL STUDIES > Selected Papers

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Selected Papers

[2009] CRUSHING BEHAVIOUR OF STEEL PLATED STRUCTURES IN COLD TEMPERATU…

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International Conference on Ship and Offshore Technology: Ice Class Vessels
28 - 29 September 2009, Busan, Korea

CRUSHING BEHAVIOUR OF STEEL PLATED STRUCTURES IN COLD TEMPERATURE: EXPERIMENTAL AND NUMERICAL STUDIES

Author(s): B J Kim, S K Park, B S Jang and J K Paik

SUMMARY :
The aim of the study reported herein was to investigate the effects of low temperatures on the crushing characteristics of steel plated structures. A series of tensile coupon tests were performed to examine their material behaviour at low temperatures, and then quasi-static axial crushing tests were carried out on thin-walled square tubes. The test tubes were made of ASTM A500-type carbon steel, and both the tensile coupon tests of the material and the crushing tests of the tubes were performed in a liquid nitrogen cooled chamber. To reflect the conditions of the Arctic environment more realistically, the tensile coupon tests of the material was also carried out in a dry-ice cooled chamber. LS-DYNA nonlinear finite element simulations were performed to investigate the structural crashworthiness of the thin-walled steel
tubes numerically. The tests in the liquid nitrogen cooled chamber showed that the fracture strain of the material was not affected (lost) by temperatures as low as -80°C, although fracture strain was significantly reduced below -100°C. The fracture strain results obtained in the dry-ice cooled chamber, however, show this strain to be affected (lost) by low temperatures even between 0°C and -80°C, which is equivalent to the Arctic environment. It was also observed that
fracture occurs in thin-walled tubes under crushing loads at low temperatures.

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