Statistical crystal plasticity model of commercially pure titanium: Validation and estimation of sensitivity to impacts perturbations

Abstract

A two-level statistical constitutive model of commercially pure titanium with hcp is considered. A series of computational experiments for uniaxial loadings with different set of mechanisms taken into account was carried out. The model identification and verification (validation) were implemented on the basis of these experiments. An algorithm for assessing of sensitivity of the macrolevel response to randomly selected perturbations of kinematic impacts during the deformation process was developed and implemented. The results of numerical simulations showed that the model is stable to these perturbations.