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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© 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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