Abstract
Numerical simulations and CAE technologies have become essential tool to reduce costs in product development stage since they can be substituted with the tests that involve actual manufacturing process and products. However, in order to obtain the simulation results which accurately reproduce the actual phenomena, model parameters and simulation conditions have to be determined accurately. In many cases, such parameters and simulation conditions are determined by trial and error, which is a time consuming process. When comparing the result of finite element analysis of deformation or fracture, one of the experimental measurement used is the data obtained using digital image correlation (DIC) method. DIC method enables us to measure deformation and strain on the surface of test specimen in three dimension. Meanwhile, data assimilation have attracted much attention as the methodology to utilize experimental measurements to improve the simulation results. In this study, we demonstrate application of data assimilation methodology to finite element analysis for utilizing DIC measurements to improve analysis result by estimating material parameters.
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