Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Comparative Study on the Nonlinear Material Model of HyperElastic Material Due to Variations in the Stretch Ratio

신장률 변화에 따른 초탄성 재료의 비선형 재료모델 비교 연구

  • Lee, Kangsu (Korea Research Institute of Ships and Ocean Engineering, KRISO) ;
  • Ki, Minsuk (Korea Research Institute of Ships and Ocean Engineering, KRISO) ;
  • Park, Byoungjae (Korea Research Institute of Ships and Ocean Engineering, KRISO)
  • 이강수 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 기민석 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 박병재 (한국해양과학기술원 부설 선박해양플랜트연구소)
  • Received : 2018.06.25
  • Accepted : 2018.08.14
  • Published : 2018.08.31
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Abstract

Recently, the application of non-steel materials in ships and offshore plants is increasing because of the development of various nonlinear materials and the improvement of performance. Especially, hyper-elastic materials, which have a nonlinear stress-strain relationship, are used mainly in marine plant structures or ships where impact relaxation, vibration suppression, and elasticity are required, while elasticity must be maintained, even under high strain conditions. In order to simulate and evaluate the behavior of the hyperelastic material, it is very important to select an appropriate material model according to the strain of the material. This study focused on the selection of material models for hyperelastic materials, such as rubber used in the marine and offshore fields. Tension and compression tests and finite element simulations were conducted to compare the accuracy of the nonlinear material models due to variations in the stretch ratio of hyper-elastic material. Material coefficients of nonlinear material models are determined based on the curve fitting of experimental data. The results of this study can be used to improve the reliability of nonlinear material models according to stretch ratio variation.

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References

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