Project CINEMAT based on X-ray micro-tomography: from digital images to material properties. Some preliminary results

摘要

In his communication Roberto Fedele outlined some preliminary results, both experimental and numerical, achieved during the first year of the multidisciplinary Project CINEMAT. Such a project, including in a tight and coordinated collaboration researchers belonging to different disciplines, has been funded in 2010 by Politecnico di Milano, in the framework of 5 per mille Call for Young Researchers. The aim of this research is to develop a novel experimental-numerical methodology, suitable to estimate material parameters on the basis of full-field kinematic measurements throughout a loaded specimen. The proposed methodology combines synergistically: (ⅰ) a sequence of 3D digital images provided at different instants by high-resolution X-ray micro-tomography, (improved with advanced technological solutions) and interfaced with an ad-hoc loading device (see e.g. [1]); (ⅱ) mathematical models describing the material behavior at different scales; (ⅲ) inverse analysis in a sequence, namely volume Digital Image Correlation (DIC) for the estimation of kinematic fields inside the bulk material (i.e. displacements and strains, see e.g. [3]), and model calibration/validation through stochastic parameter identification techniques [2].