Quantifying the Effectiveness of Patterning, Test Conditions, and DIC Parameters for Characterization of Plastic Strain Localization
| Autor: | Sven Bossuyt, Gianmario Scotti, Antti Forsström, Hannu Hänninen |
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| Přispěvatelé: | Advanced Manufacturing and Materials, Department of Communications and Networking, Department of Mechanical Engineering, Aalto-yliopisto, Aalto University |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Digital image correlation
Spatial resolution Materials science Noise (signal processing) Mechanical Engineering Acoustics Aerospace Engineering Context (language use) 02 engineering and technology 021001 nanoscience & nanotechnology Displacement (vector) Patterning 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Displacement field 0210 nano-technology Noise Strain localization Image resolution Strain gauge Extensometer |
| Popis: | Digital image correlation, commonly referred to as DIC, enables full-field measurements of displacements and strains from a surface of interest. While DIC offers major advantages over commonly established methods, such as strain gauges or extensometers, some questions remain in guaranteeing data precision of the DIC measurements. This paper reports on improvements in the precision of DIC measurements of large deformations in copper tensile specimens by optimized patterning and lighting conditions, as well as quantifying the improvements in the data. In the context of detection of strain localization at welds in copper canisters for spent nuclear fuel disposal, the trade-off between spatial resolution and strain resolution is critical. To quantify the improvements in measurement conditions, we propose a method for estimation of spatial resolution and noise level of a full-field strain measurement, which does not require imposing a displacement field with variations in strain or displacement of well-defined length scale. |
| Databáze: | OpenAIRE |
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