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- W2890142122 abstract "An experimental methodology has been developed for the tensile characterisation of ductile isotropic metals at high strain-rate. This study includes the region beyond plastic instability or necking, which is rarely analysed for conventional applications. The research explores an imaging technique used to track the geometry of the specimen during tensile tests and calculate true local values of stress and strain by applying Bridgman theory [1]. To improve the quality of the images taken at high strain-rate an in-situ high speed shadowgraph technique has been developed, and to obtain better results from the images a sub-pixel accuracy edge detection algorithm has been implemented. The technique has been applied to an austenitic stainless steel. Its tensile behaviour has been assessed by testing round samples at strain-rates ranging from quasi-static to ~10 3 s -1 . The results obtained with the proposed methodology have been validated by comparison with more conventional techniques such as video-extensometer and digital image correlation in the pre-necking region and good performance even at the highest strain-rate tested has been proved." @default.
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- W2890142122 date "2018-01-01" @default.
- W2890142122 modified "2023-10-16" @default.
- W2890142122 title "Experimental methodology for the measurement of plasticity on metals at high strain-rates" @default.
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- W2890142122 doi "https://doi.org/10.1051/epjconf/201818302063" @default.
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