A comparison of strain calculation using digital image correlation and finite element software

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Iadicola, M.^1 ; Banerjee, D.^1

Material Measurement Laboratory, NIST, Gaithersburg

MD, United States^1

关键词: D. digital image correlation (DIC);    Digital image correlations;    Finite element software;    Material failures;    Quantitative comparison;    Simulated results;    Strain calculations;    Strain localizations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032013/pdf
DOI  :  10.1088/1742-6596/734/3/032013

来源: IOP

【 摘 要 】

Digital image correlation (DIC) data are being extensively used for many forming applications and for comparisons with finite element analysis (FEA) simulated results. The most challenging comparisons are often in the area of strain localizations just prior to material failure. While qualitative comparisons can be misleading, quantitative comparisons are difficult because of insufficient information about the type of strain output. In this work, strains computed from DIC displacements from a forming limit test are compared to those from three commercial FEA software. Quantitative differences in calculated strains are assessed to determine if the scale of variations seen between FEA and DIC calculated strains constitute real behavior or just calculation differences.