9.5 Summary A portable and easy-to-implement experimental method based on 3D DIC is used to measure the full-field deformation of flat, stainless steel dog bone specimens under tension at temperatures ranging from 25 to 900 C. The experimental setup consists of an induction coil heating and a stereo-camera system equipped with optical band-pass notch filters and blue LED illumination. Using the recorded load and full-field strain data as the input, a VFM-based approach is implemented to identify the constitutive parameters governing the plastic deformation of the material at high temperatures. Using these parameters, the stress–strain curves obtained at varying temperatures are corrected and replotted at constant temperatures. Acknowledgements The support provided by Dr. Ravi Penmetsa and his colleagues at the Air Force Research Laboratory is gratefully acknowledged. References 1. Lyons, J.S., Liu, J., Sutton, M.A.: High-temperature deformation measurements using digital-image correlation. Exp. Mech. 36, 64–70 (1996). doi:10.1007/BF02328699 2. Pan, B., Wu, D., Wang, Z., Xia, Y.: High-temperature digital image correlation method for full-field deformation measurement at 1200 C. Meas. Sci. Technol. 22, 1–11 (2011). doi:10.1088/0957-0233/22/1/015701 3. Guo, X., Liang, J., Tang, Z., Cao, B., Yu, M.: High-temperature digital image correlation method for full-field deformation measurement captured with filters at 2600 C using spraying to form speckle patterns. Opt. Eng. 53(6), 063101 (2014). doi:10.1117/1.OE.53.6.063101 4. Grant, B., Stone, H., Withers, P., Preuss, M.: High-temperature strain field measurement using digital image correlation. J. Strain. Anal. Eng. Des. 44(4), 263–271 (2009). doi:10.1243/03093247JSA478 5. Koohbor, B., Valeri, G., Kidane, A., Sutton, M.: Thermo-mechanical properties of metals at elevated temperatures. In: Jin, H., Yoshida, S., Lamberti, L., Lin, M. (eds.) Advancement of Optical Methods in Experimental Mechanics, vol. 3, pp. 117–123 (2016). doi:10.1007/978-3-31922446-6_15 6. Chen, X., Xu, N., Yang, L., Xiang, D.: High temperature displacement and strain measurement using a monochromatic light illuminated stereo digital image correlation system. Meas. Sci. Technol. 23(12) (2012). doi:10.1088/0957-0233/23/12/125603 7. Berke, R.B., Lambros, J.: Ultraviolet digital image correlation (UV-DIC) for high temperature applications. Rev. Sci. Instrum. 85(4), 1 (2014). doi:10.1063/1.4871991 8. Avril, S., Pierron, F., Sutton, M.A., Yan, J.: Identification of elasto-visco-plastic parameters and characterization of Lüders behavior using digital image correlation and the virtual fields method. Mech. Mater. 40, 729–742 (2008). doi:10.1016/j.mechmat.2008.03.007 Fig. 9.6 Corrected stress– strain curves replotted at constant temperatures 82 G. Valeri et al.
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