10 April 2017 Effect of out-of-plane specimen movement on the accuracy of the smallest specimen strain measurable using the digital image correlation technique
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Abstract
This investigation determined the smallest strain accurately measurable by a state-of-the-art digital image correlation (DIC) – based tool used in structural health monitoring, in a specimen subjected to out-of-plane movement, building upon a study that concluded that out-of-plane specimen movement results in noise in DIC-based strain measurements. This study was motivated by initially undetected damage at low strains in connections of a real-world bridge, whose detection would have prevented its propagation, resulting in lower repair costs. The smallest strains accurately measurable using the state-of-the-art DIC tool, over a range of specimen out-of-plane displacement amplitudes, were determined.
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Joel Poling, Niranjan Desai, "Effect of out-of-plane specimen movement on the accuracy of the smallest specimen strain measurable using the digital image correlation technique", Proc. SPIE 10170, Health Monitoring of Structural and Biological Systems 2017, 101702L (10 April 2017); doi: 10.1117/12.2258496; https://doi.org/10.1117/12.2258496
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