Strain field evolution on the surface of aluminum sheet alloys exposed to specific impact with oscillation loading

Abstract

Strain field evolution on the surface of aluminum sheet D16 and 2024-T3 alloys has been analyzed during static deformation and during specific high-speed impact and oscillation loading—dynamical non-equilibrium process. Experiments have been conducted using an original mechanical testing technique and a specially developed software solution for non-contact study of strain field using digital image correlation fitted with a high-speed camera. It has been established that deformation process kinetics for tested aluminum alloys after a dynamical non-equilibrium process during further static deformation changes as compared with a process of static deformation mainly manifests itself in the increase in general alloy ductility and delay in “neck formation.” It has been shown that strain field is an important indicator for deformation band structure formation in the tested materials.