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The Effective Young's Modulus of Model Ice Sheet in Ice Basin

빙해수조 모형빙판의 유효탄성계수 산출

Lee, Jae-Hwan;Choi, Bong-Kyun;Kim, Tae-Wan;Lee, Chun-Ju
이재환;최봉균;김태완;이춘주

  • Received : 2014.11.15
  • Accepted : 2015.06.23
  • Published : 2015.08.20

Abstract

In this paper, the theory of rectangular plate on the elastic foundation is used to get the relation equation between the effective Young’s modulus and the ice sheet deflection by applying the characteristic length concept, since the model ice sheet is rectangular shape in KRISO (Korea Research Institute for Ships and Ocean Engineering) ice basin. The obtained relation equation is equal to that of using the circular plate theory. A device is made and used to measure the deflection of ice plate using LVDT (Linear Variable Differential Transformer) for several loading cases and the procedure of experiments measuring the deflection used for getting the Young’s modulus is explained. In addition, the flexural strength value obtained through flexural strength experiments is compared with that of finite element analysis using the obtained effective Young’s modulus. Also, a nonlinear FEA (Finite Element Analysis) of cantilever ice beam is done with eroding effect and LS-DYNA result shows the fracture of brittle ice under 1 mm/s velocity load.

Keywords

KRISO Ice basin;Plate characteristic length;Model ice effective elastic modulus and flexural strength;Nonlnear FEA;Eroding

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