Advancement of Optical Methods in Experimental Mechanics, Volume 3 by Luciano Lamberti Ming-Tzer Lin Cosme Furlong & Cesar Sciammarella

Author:Luciano Lamberti, Ming-Tzer Lin, Cosme Furlong & Cesar Sciammarella
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

9.2 Virtual Test Case

The performance of the different optimization methods is analyzed based on a virtual experiment. This virtual experiment concerns a tensile experiment with a dogbone tensile specimen, see Fig. 9.1, on which a load is prescribed on both edges. In a virtual experiment no real experimental images are used, but a finite element (FE) simulation is executed and the resulting displacement fields are used to artificially deform a reference image, see Fig. 9.2. These images form the input for the integrated DIC method. The objective is to correlate these images in order to find the model parameters, in this case the Young’s modulus E and Poisson ratio ν, that were used in the elastic isotropic FE model used to create the images. The parameters used to create the virtual experiment are E p = 1. 3 ⋅ 105 Pa and ν p = 0. 28.

Fig. 9.1Finite element simulation for the virtual experiment concerning a dogbone tensile sample. A load is prescribed on the left and right edge. A quarter of the structure is modeled, the red lines indicate symmetry lines. The region of interest is indicated by the green rectangle

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