Abstract
Abstract Measurements made using digital image correlation were compared to both strain gages and displacement transducers during the testing of a fiber metal laminate cylinder under torsional loading. The image correlation results showed very good agreement with measurements made using both strain gages and displacement transducers. The image correlation results were also used to measure out-of-plane displacement of the cylinder and to determine the exact onset of initial buckling. Although strain gages remain a proven and valuable technology for measuring strain, image correlation can completely characterize full-field strains and full-field displacements in the cylinder. In addition, image correlation is able to provide insight into the material behavior at strain values where the gages are less reliable and more prone to failure.
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