Specifications
- Calibration targets: different sizes with spacing from 0.45 mm to 10 mm for a field of view from 4 x 4 mm up to 100 x 100 mm
- DAQ and trigger device: for synchronization with other setups
- VIC-2D and VIC-3D software package:
- - In-plane resolution: 10-5 x FOV
- - Out-plane resolution: 2 x 10-5 x FOV
- - Strain resolution: ~30 μstrain
- - Strain range: 0.005% to >2000%
- Year of acquisition: 2016
- Funding: FWO Medium-scale research infrastructure (Hercules)
Cameras
- Cameras: Flir Grasshopper3 GS3-U3-51S5M-C (5 Mpx, 75 Hz @ full resolution) AVT Manta G-917 (9.2 Mpx, 10.1 Hz @ full resolution)
- Lenses: Schneider lens Xenoplan 1.4/23 (large FOV) Kowa lens LM50SC 1” 50/F2.0 (small FOV)
- Extensions tubes: to optimize zoom and focal distance
- Year of acquisition and funding: 2016, FWO Medium-scale research infrastructure (Hercules) & internal KU Leuven funding
What is the DIC?
DIC is an optical technique to measure shape, full field deformation and strain of the surfaces of a specimen. The set-up consists of a single camera for planar deformations (2D) and two cameras in stereovision for non-planar deformations (3D). It can be used for a range of specimen sizes by using the right calibration target. A speckle pattern needs to be applied to the specimen to automatically track the displacement and deformations. This set-up is mostly used in combination with a mechanical testing set-up to measure the full field deformation of the sample during the test.
Application example
In combination with the TA Electroforce 3330, a human iliotibial tract was dynamically characterized. A speckle pattern was applied using methylene blue as background and white paint applied with an airbrush. Images were synchronously captured during uniaxial stretching and the strain and displacement field extracted.