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

The Society of Naval Architects of Korea (대한조선학회)
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Prediction of Material Behavior and Failure of Fresh Water Ice Based on Viscoplastic-Damage Model

점소성 손상모델 기반 담수빙 재료거동 및 파손 예측

  • Choi, Hye-Yeon (Department of Naval Architecture and Ocean Engineering, Pusan Naval University) ;
  • Lee, Chi-Seung (Department of Naval Architecture and Ocean Engineering, Pusan Naval University) ;
  • Lee, Jong-Won (Department of Naval Architecture and Ocean Engineering, Pusan Naval University) ;
  • Ahn, Jae-Woo (Daewoo Shipbuilding & Marine Engineering) ;
  • Lee, Jae-Myung (Department of Naval Architecture and Ocean Engineering, Pusan Naval University)
  • 최혜연 (부산대학교 조선해양공학과) ;
  • 이치승 (부산대학교 조선해양공학과) ;
  • 이종원 (부산대학교 조선해양공학과) ;
  • 안재우 (대우조선해양(주)) ;
  • 이제명 (부산대학교 조선해양공학과)
  • Received : 2010.12.01
  • Accepted : 2011.05.06
  • Published : 2011.06.20
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Abstract

In the present study, a unified viscoplastic-damage model has been applied in order to describe the mechanical characteristics of fresh water ice such as nonlinear material behavior and volume fraction. The strain softening phenomenon of fresh water ice under quasi-static compressive loading has been evaluated based on unified viscoplastic model. The material degradation such as growth of slip/fraction has quite close relation with material inside damage. The volume fraction phenomenon of fresh water ice has been identified based on volume fraction (nucleation and growth of damage) model. The viscoplastic-damage model has been transformed to the fully implicit formulation and the discretized formulation has been implemented to ABAQUS user defined subroutine (User MATerial: UMAT) for the benefit of application of commercial finite element program. The proposed computational analysis method has been compared to uni-axial compression test of fresh water ice in order to validate the compatibilities, clarities and usefulness.

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References

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