Full fied monitoring of test coupons by Digital Image Correlation
Displays the global displacement and strain fields in X,Y,Z of the critical areas of structure submitted to mechanical loads.
This is the ideal technique to explore the behaviour of inhomogeneous and anistropic materials like composite materials as well as metallics.
What is Digital Image Correlation ?
■ DIC is an optical method to measure the position of a field of points on a given surface.
■ From two successive images of the surface the 3D displacements and strains of the measured points can be calculated.
■ 1 Speckle pattern painted and bounded on to the surface of the structure which follows its deformation.
■ 2 Cameras for stereos-vision.
■ 1 Software to correlate the information from the images.
Vic 3D system and spotlights.
Optical measurement : no contact with the structure.
The system is located around the structures.
The measurement can be remoted (up to 100 m or more)
■ Displacement fields (absolute or relatively to a state of deformation)
■ Strain fields
■ Statistics for each point of the image
■ Evolution of a point, profile in any direction, rotation
Example of results
Out of plane measurement with Line and point extractions.
■ Whole field result map
■ Easy comparison with the FEM results calculated by the design offices.
■ The resulting datas can be retrieved in a dat file and loaded into any CAD software.