역설계기법을 사용한 탄성체 해석모델 계수 추정에 관한 연구

Abstract

The object of this research is focuses on the proposal of a proper material model for hyperelastic material in offshore application. Materials of offshore structure have been variously applied to a fabrication, transportation and installation of main component of offshore plant such like a connections, mooring lines and docking absorber in recent years. Steel material conventionally has been used in ship and offshore industry related to the hull structure. In order to idealize a material modeling, it was considered that nonliearities and large deformation of hyperelastic material can be reflected on the simulation. It was performed that the experimental test of mechanical property for hyperelastic in the laboratory using tension and compression measurement system. Approximation techniques of nonlinear material in offshore application is now developing related to very low temperature condition like a polar enviroment. Hyperelastic materials having five level ranges for stiffness of specimen are taken into account where representative coefficients are determined based on the curve fitting of an experimental data. The results of experiment were compared with numerical simulation for tension and compression tests of hyperelastic material. Finite element model of specimen was generated to simulate to compare with a tension and compression test. In order to prevent divergence of a numerical simulation due to large deformat