Journal
STRAIN
Volume 53, Issue 3, Pages -Publisher
WILEY
DOI: 10.1111/str.12226
Keywords
3-D digital image correlation; high-speed photography; nondestructive evaluation techniques
Funding
- Heterogeneous Mechanics in Hexagonal Alloys across Length and Time Scales [EP/K034332/1]
- Engineering and Physical Sciences Research Council [1584011] Funding Source: researchfish
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We describe 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 DIC tools within the MATLAB framework, a single camera three-dimensional DIC system with submicron 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 quasi-static tests showcasing the ability to detect both in- and out-of-plane motion. Finally, a high strain-rate (1.2x10(3)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.
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