Mechanical Properties Identification of Particulate Composites Constitutive Materials using Virtual Fields Method

This study is concerned with developing an identification procedure based on Virtual Fields Method (VFM) in three-dimensional scale. This approach enables to identify unknown mechanical parameters of composite materials constitutive phases from 3D full-field measurements. Moreover, a Regularized Virtual Fields (RVF) method is proposed in which thanks to the applied mechanical constraints, consisting of an appropriate homogenization model, the accuracy of the obtained parameters is enhanced. The developed algorithms are validated by conducting virtual experiments through elastic properties identification of particulate composites. The performance of both identification methods are evaluated in the presence of noisy strain data of particulate composites with different contrasts of mechanical properties. The presented approaches show great potential for determining in-situ properties of bulk composites.