Two digital cameras record the deformation process; the images are analysed with sub pixel accurate image correlation algorithms. For every object point (camera pixel) the 3D displacements and strain components (e.g. Exx, Eyy, Exy, E1 and E2) are calculated. Depending on the camera type, the system can be used for quasi static and highly dynamic events. The object's surface must have a stochastic pattern (natural or prepared). Rigid body movements are taken into account for the strain measurement.

Application fields:

Material testing, stability tests, composite materials, in tension test machines, for the validation of FEM simulations, crack propagation and dynamic tests.

Deformation measurement with digital image correlation on a small gear tooth:  The full field strain and displacement field is measured with the contact less optical measurement technique. The result image allows an accurate localization of the values. Those can be extracted and analysed for all or just single data points of the measured area.

Technical Specifications (depending on the selected hardware):

Further Information: