PROCESSING OF HIGH-SPEED CAMERA IMAGES OF HOPKINSON BAR EXPERIMENTS USING DIGITAL IMAGE CORRELATION

Abstract

: In this paper, digital image correlation method (DIC) is introduced as a tool for evaluation of high strain-rate experiments perfomed using Hopkinson Bar apparatus. Samples of advanced cellular materials with predefined periodic structure and negative Poisson’s ratio (auxetic structures) were investigated in this study. In-house Hopkinson Pressure Bar apparatus was used to perform the impact experiments and the experimental setup was observed using a pair of high-speed cameras. Custom DIC software tool was used to evaluate high-speed cameras records. Selected representative results of DIC applications on Hopkinson Bar experiments are provided in this paper.