실험데이터 불확실성에 따른 비선형재료모델의 변화 분석

Abstract

The hyperelastic materials such as rubber used in various fields have a non-linear relationship between stress and strain, so the Hooke·s law does not apply. Therefore, the behavior of nonlinear material models expressed by the strain energy is used to simulate the behavior of the hyperelastic material. For analysis using nonlinear material models, material model constants should be extracted through material property tests such as Uniaxial test, Planar test and biaxial test. However, The material property tests have various uncertainties such as manufacturing tolerances of the test specimens and operating errors of the experimental equipment, so different results can be obtained even in the same test using the same material. In this study, nonlinear analysis is performed using a representative nonlinear material models(Mooney-Rivlin, Ogden, Arruda-Boyce) by applying statistical techniques and analyzed the effect of the variability of experimental results caused by uncertainty on the analysis results.