초탄성재료 해석을 위한 재료모델 계수에 관한 실험적 연구

Abstract

Hyperelastic materials such as rubber are used in various fields such as machinery, civil engineering and marine for reducing of vibration, noise and impact. Hooke·s law does not apply to superelastic materials because stress and strain have nonlinear relations. Therefore, nonlinear material model expressed by strain energy is used to simulate the behavior of hyperelastic material. For reliable analysis, it is important to select appropriate material model and to derive appropriate material model coefficient through material test. In this study, to analyze numerical simulation results of hyperelastic materials according to the combination of test data. Simple tension test, planar test and biaxial test were performed on specimens based on natural rubber with a hardness of 43 and material model coefficients were derived according to the combination of test results. Nonlinear analysis are carried out for Mooney-Rivlin model and Ogden model toinvestigate the change of analysis results according to the combination of test results.