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Details on digital image correlation (DIC) set-up.
| Technique Used | Image Correlation |
|---|---|
| Subset size | 31 × 31 pixels2 |
| Shift | 5 pixels |
| Camera | 8 bit, Vic 5M |
| Field of view | 35 mm (L) × 40 mm (W) |
| Image recording rate | 2 Hz |
| Spatial resolution | 0.0285 mm/pixel |
| Displacement resolution | around 0.025 pixel |
| Strain resolution | around 0.8 × 10−4 |
