Abstract
This study has developed an inspection system based on digital image correlation and has used the system to measure deformation strain a cantilever beam subjected to a concentrated load at its free end. The work uses two experiments to observe the full-field distribution of displacement and strain on the measured area, which locates at the free end and at the fixed end. The in-situ measurements have given consistent agreement with those obtained from commercial systems such as mechanical stage and strain gauge. The method of digital image correlation has given not only accurate values of displacement in dual directions but also provided complete information on strain distribution. The self-developed algorithm provides a high resolution of 1.56 µm/pixel, and retrieves precise results from the recorded images in high computational efficiency.
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Acknowledgements
The authors acknowledge the financial support of this research by the Ministry of Science and Technology (Republic of China) under Grant 108-2622-E-027-021-CC3, 107-2218-E-027-018, 108-2218-E-027-017, and 108-2221-E-002-131-MY3.
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Ma, CC., Ho, HW., Chou, WH. et al. In-situ measurements of strain distribution by coupling digital image correlation and an optical microscope. Microsyst Technol 28, 333–339 (2022). https://doi.org/10.1007/s00542-020-04760-6
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DOI: https://doi.org/10.1007/s00542-020-04760-6