Abstract
The digital image correlation (DIC) method is an advanced technical method to measure material strain by comparing several captured figures during deformation. DIC provides full-field displacements and full-field strains in recorded images. In fact, there is much software using the DIC algorithm. However, a commercial DIC system requires a high initial investment. In this study, the DIC algorithm was built based on the open-source of Matlab software, temporarily called NCORR DIC . A DIC system was built including a computer system, extensometer, tensile testing machine, high-resolution camera, NCORR DIC software and applied for AL5052 sheet metal test sample. After obtaining the images from the tensile test , the entire image will be included in the NCORR DIC software for processing. To check the accuracy of the DIC system, the results of the stress-strain curve of NCORR software were compared with the standard test method using extensometer. The obtained results measured from NCORR DIC software were imported into a finite element method (FEM) software to check the accuracy of this method. Moreover, the hardening model (Voce, Swift, Kim-Tuan) provides empirical evidence and prerequisite conditions for the development of new fracture criteria to describe behavior fractures .
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This research is funded by University Project at Hanoi University of Science and Technology under grant number “T2018-TĐ-204”.
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Do, ND., Nguyen, VT., Nguyen, DT. (2020). A Comparison Study of a DIC and Extensometer on Stress-Strain Curve for AL5052 Aluminum Sheets and Its FEM Applications. In: Parinov, I., Chang, SH., Long, B. (eds) Advanced Materials. Springer Proceedings in Materials, vol 6. Springer, Cham. https://doi.org/10.1007/978-3-030-45120-2_38
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DOI: https://doi.org/10.1007/978-3-030-45120-2_38
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