Abstract
The present work is aimed to analyze the dynamic bending response of a copper specimen. The specimen is impacted in a three point bending configuration using a Hopkinson bar apparatus. The impact force is measured by the use of two piezoelectric load-cells located behind the supports of the three point bending fixture. Dynamic deformation response of the specimen is studied and analyzed through the use of ultra-high speed photography in conjunction with digital image correlation. To do this, an ultra-high speed HPV-X camera is utilized to capture images of the specimen during deformation time at a frame rate of 106 frames per second. Full-field distributions of in-plane displacement and strain components are studied and used to calculate the strain rate and acceleration distributions in the specimen. An analytical approach based on the Virtual Fields Method (VFM) is then implemented which allows for the calculation of inertia forces developed in the specimen. In addition, the method of virtual fields is used in this work to identify the rate-dependent constitutive response of the material at plastic deformation regime.
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Koohbor, B., Kidane, A., Sutton, M.A., Zhao, X. (2017). Analysis of Dynamic Bending Using DIC and Virtual Fields Method. In: Yoshida, S., Lamberti, L., Sciammarella, C. (eds) Advancement of Optical Methods in Experimental Mechanics, Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-41600-7_17
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DOI: https://doi.org/10.1007/978-3-319-41600-7_17
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