抄録
The analytical solution of an infinite plate with a circular hole is introduced for investigating algorithm errors in identification of material parameters instead of performing actual experiments. The simulated speckle image pairs, consisting of undeformed images and deformed images, are created from analytical function. Then, a new formulation of digital image correlation (DIC) based on optical flow and finite element methods is developed to estimate heterogeneous displacement fields from simulated speckle images. The compliance coefficients of testing materials are iteratively computed by comparing finite element strains to DIC strains. The isotropic and orthotropic models of material parameters are investigated for accuracy of the purposed algorithms. The interaction between algorithm errors is studied. The sources of errors are discussed and progressive improvement is suggested for these identification techniques.
