Autor(en): | Corallo, L. Verleysen, P. |
Titel: | A novel Hopkinson-based technique for high-speed biaxial testing of sheet metals |
Sprache (ISO): | en |
Zusammenfassung: | Forming processes of sheet metals require knowledge of the material behaviour up to large levels of plastic deformation. To this purpose, biaxial bulge tests are often used. In present paper, a dynamic bulge test is presented. The testing principle relies on conventional split Hopkinson bar testing. Though, as opposed to existing setups, a different positioning of the bars leaves the sample fully accessible for optical measurements. The pressure imposed to a circular sample, together with the sample strain fields, allow to obtain reliable stress-strain data till significantly larger strains compared to tensile tests. The technique is illustrated by tests on an Al2024-T3 sheet. High speed camera imaging of the deforming sample combined with digital image processing is used to obtain full-field strain data. To quantitatively assess the added value of full-field strain measurements, stress-strain curves obtained with and without the strain data are compared. |
Schlagwörter: | high-speed forming high-speed digital imaging dynamic biaxial testing |
URI: | http://hdl.handle.net/2003/40667 http://dx.doi.org/10.17877/DE290R-22525 |
Erscheinungsdatum: | 2021-10-15 |
Ist Teil von: | 9th International Conference on High Speed Forming |
Enthalten in den Sammlungen: | ICHSF 2021 |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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21_Corallo et al.pdf | DNB | 434.39 kB | Adobe PDF | Öffnen/Anzeigen |
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