Accurate and precise digital image correlation: impact on material identification Seminar

Abstract:

Digital image correlation (DIC) is an optical-numerical measurement technique that not only allows to reconstruct the shape of objects, but more importantly determines the displacement and stain fields at the surface of this object under any kind of loading. Thanks to its full-field character it is a technique often applied to identify  mechanical material parameters for a widespread range of different materials. Indeed, in contrast to standard testing with stringent conditions on the preparation of the specimens one now can get access to these parameters in a single test setup.

In this presentation the basic fundamentals underlying the technique will be reviewed with specific focus of some error sources that might harm both the accuracy and precision of the technique. Moreover, the impact of these error sources on the final determined material parameters will be studied via a numerical simulator that includes DIC and the Virtual Fields Method (VFM) for material identification.