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Erschienen in: Experimental Mechanics 2/2017

01.11.2016

Synchronous Full-Field Strain and Temperature Measurement in Tensile Tests at Low, Intermediate and High Strain Rates

verfasst von: J.D. Seidt, V-T. Kuokkala, J.L. Smith, A. Gilat

Erschienen in: Experimental Mechanics | Ausgabe 2/2017

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Abstract

Tensile tests with simultaneous full-field strain and temperature measurements at the nominal strain rates of 0.01, 0.1, 1, 200 and 3000 s−1 are presented. Three different testing methods with specimens of the same thin and flat gage-section geometry are utilized. The full-field deformation is measured on one side of the specimen, using the DIC technique with low and high speed visible cameras, and the full-field temperature is measured on the opposite side using an IR camera. Austenitic stainless steel is used as the test material. The results show that a similar deformation pattern evolves at all strain rates with an initial uniform deformation up to the strain of 0.25–0.35, followed by necking with localized deformation with a maximum strain of 0.7–0.95. The strain rate in the necking regions can exceed three times the nominal strain rate. The duration of the tests vary from 57 s at the lowest strain rate to 197 μs at the highest strain rate. The results show temperature rise at all strain rates. The temperature rise increases with strain rate as the test duration shortens and there is less time for the heat to dissipate. At a strain rate of 0.01 s−1 the temperature rise is small (up to 48 °C) but noticeable. At a strain rate of 0.1 the temperature rises up to 140 °C and at a strain rate of 1 s−1 up to 260 °C. The temperature increase in the tests at strain rates of 200 s−1 and 3000 s−1 is nearly the same with the maximum temperature reaching 375 °C.

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Metadaten
Titel
Synchronous Full-Field Strain and Temperature Measurement in Tensile Tests at Low, Intermediate and High Strain Rates
verfasst von
J.D. Seidt
V-T. Kuokkala
J.L. Smith
A. Gilat
Publikationsdatum
01.11.2016
Verlag
Springer US
Erschienen in
Experimental Mechanics / Ausgabe 2/2017
Print ISSN: 0014-4851
Elektronische ISSN: 1741-2765
DOI
https://doi.org/10.1007/s11340-016-0237-z

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