Abstract
A methodology is presented for characterizing the Taylor impact response of materials using high-speed digital image correlation. The motivation of this work is to understand material failure during high-rate loading and extract high-fidelity, quantitative data which captures the deformation history. Taylor impact experiments were chosen because they are a well-established means of assessing material behavior at high strains and strain rates. They are also particularly useful for exercising computational models. Digital image correlation was then identified as a promising technique to provide time-resolved, full-field characterization of the multi-axial failure behavior. This study shows the high-rate response of copper using symmetrical Taylor impact at several impact velocities. The utility and challenges associated with performing stereo digital image correlation with ultra-high-speed cameras and conducting Taylor impact studies are also discussed. The approach has implications for determining the susceptibility of materials to different failure modes and can provide a robust validation of computational models. One of the key features of interest will be the direct comparison between the experiments and the computational models.
Published Version
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