Abstract
An optical technique to study material behaviour at high strain rates is presented. A small specimen is subjected to a rapid tensional loading in a Hopkinson bar type of arrangement where the loading is measured in the bar following the specimen. A high-speed camera of the image converter type is used to acquire time-resolved images during the loading. These images are evaluated using digital speckle photography to give the in-plane strain field. A calibration procedure is included that compensates for the aberrations in the camera. Experimental results on mild steel are further compared with a finite element calculation with the result that both strain fields show the same general behaviour, but some discrepancies appear that need to be further analysed in the future.
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References
Sjödahl, M. Electronic speckle photography: increased accuracy by non-integral pixel shifting. Appl. Opt., Vol. 33, pp. 6667–6673, 1994.
Sjödahl, M. Accuracy in electronic speckle photography. Appl. Opt, Vol. 36, pp. 2875–2885, 1997.
Synnergren, P. and Sjödahl, M. A stereoscopic digital speckle photography system for 3-D displacement field measurements. Opt. and Las. in Eng., Vol. 31, 425–443, 1999.
Thuvander, F., Sjödahl, M. and Berglund, L. A. Measurements of crack tip strain field in wood at the scale of growth rings. To appear in J. Mat. Sci, 2000.
Chiang, F. P. and Wang, Q. Speckle interferometry with nanoparticles. Proc. SPIE, Vol. 3407, pp. 310–317, 1998.
Synnergren, P., Goldrein, H. T. and Proud, W. G. Application of Digital Speckle Photography to Flash X-ray Studies of Internal Deformation Fields in Impact Experiments. Appl. Opt., Vol. 38, pp. 4030–4036, 1999.
Press, Teukolsky, Vetterling, Flannery. Numerical recipies in C, 2nd ed., (Cambridge University Press, Cambridge UK, 1992).
Campbell, J. D. and Ferguson, W. G. The temperature and strain rate dependence of the shear strength of mild steel. Phil. Mag., Vol. 21, 63–82, 1970.
ABAQUS User’s manual, version 5.8, Hibbit, Karlsson and Sorensen, Inc, 1998.
Perzyna, P. The Constitutive Equations for Rate-Sensitive Plastic Materials. Q. Appl. Math., Vol. 20, 321–332, 1963.
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© 2003 Kluwer Academic Publishers
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Kajberg, J., Sjödahl, M. (2003). Optical Method to Study Material Behaviour at High Strain Rates. In: Ståhle, P., Sundin, K.G. (eds) IUTAM Symposium on Field Analyses for Determination of Material Parameters — Experimental and Numerical Aspects. Solid Mechanics and its Applications, vol 109. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0109-0_6
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DOI: https://doi.org/10.1007/978-94-010-0109-0_6
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-1283-9
Online ISBN: 978-94-010-0109-0
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