Nanostrain sensitivity in a wire torsion experiment
Review of Scientific Instruments2020Vol. 91(1), pp. 013901–013901
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Waris Ali, Dabiao Liu, Junning Li, A. D. Pery, N. Herrada, David Mills, R. A. Owen, Perry August Burton, Dianjin Dong, G. Gannaway, A. J. Bushby, D. J. Dunstan
Abstract
The feasibility of a thin-wire torsion stress-strain experiment with nanostrain sensitivity is demonstrated. A gauge length of 50 m was made possible by using The Monument, London, thereby restoring it to its original purpose as a scientific instrument. A wire of 150 μm diameter was studied using the load-unload method, and data were recorded in the elastic regime and through the elastic-plastic transition. Analysis of this preliminary experiment suggested some necessary improvements to the equipment and methods. Progress towards definitive experiments is described together with difficulties still to be overcome.
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