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Abstract
Advanced 3D Digital Image Correlation is employed to characterize material mechanical behavior using high speed cameras at sub-Hopkinson regime (0.1 s−1 to 1000 s−1) at Oak Ridge National Laboratory. The 3D full field deformation map generated using this technique is shown in the figure. The material deformation in the area of interest is accurately recorded. In this paper, the stresses are calculated based on the elastic strains in the tab of a standard dog-bone shaped specimen (position A), and the stresses show little or no noise comparing to load cell signals for strain rates of 100 s−1 and lower. Reliable stress-strain curves are generated at these high strain rates. Further details can be found in the article by Y. Wang et. al. on page 943.
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