Specialized article
Non-invasive technique for materials testing
As a result of a new strategic alliance with GOM Metrology, [...]
DIGITAL VIDEO IMAGE CORRELATION, A NON-INVASIVE AND NON-CONTACT TECHNIQUE THAT ALLOWS TO KNOW THE CHARACTERISTICS OF A MATERIAL OR A COMPLETE ELEMENT WITHOUT INTERFERING WITH ITS REAL CONDITIONS.
As a result of a new strategic alliance with GOM Metrology(ZEISS), the Alava Group will enhance the application of digital video image correlation (DIC) systems. Specifically, ARAMIS for measuring displacement, deformation and stress, and ARGUS suitable for forming analysis. A non-invasive technique for materials testing.
One of its main functionalities should be highlighted: it does not limit the measurement field to the positioning point of a strain gauge. But to the area corresponding to the field of view of one or more digital cameras.
In this way, data are obtained from a partial surface of the object or even the entire object, avoiding unnecessary test repetitions and providingmuch more accurate results.
Characterization and testing of materials
- From the optical point of view, the principle is simple. Using one or several cameras , consecutive images are obtained of the material subjected to some kind of excitation.
- The video correlation software compares a reference image with images captured during the test. Using advanced correlation algorithms, the software shows the user object contours, displacements, stresses and even vibration frequencies.
- The system is compatible with cameras of various frame rates. In addition, microscopic systems and thermal cameras. This will allow it to be used with any object regardless of its size or test speed.
Some of its applications include:
Biomechanics, crash tests, airbag explosion tests, ballistics, load tests, garment and sports equipment tests, among others.
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