A single camera three-dimensional digital image correlation system for the study of adiabatic shear bands
We desribe the capability of a high resolution three-dimensional digital image correlation (DIC) system specifically designed for high strain-rate experiments. Utilising open-source camera calibration and two-dimensional digital image correlation tools within the MATLAB framework, a single camera 3-...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal article |
| Published: |
John Wiley & Sons Ltd
2017
|
| Summary: | We desribe the capability of a high resolution three-dimensional digital image correlation (DIC) system specifically designed for high strain-rate experiments. Utilising open-source camera calibration and two-dimensional digital image correlation tools within the MATLAB framework, a single camera 3-D DIC system with sub-micron displacement resolution is demonstrated. The system has a displacement accuracy of up to 200 times the optical spatial resolution, matching that achievable with commercial systems. The surface strain calculations are benchmarked against commercially available software before being deployed on quasistatic tests showcasing the ability to detect both in- and out-of-plane motion. Finally, a high strain-rate (1.2×103 s −1 ) test was performed on a top-hat sample compressed in a split-Hopkinson pressure bar in order to highlight the inherent camera synchronisation and ability to resolve the adiabatic shear band phenomenon |
|---|