Image-Based Inertial Impact Test for Characterisation of Strain Rate Dependency of Ti6Al4V Titanium Alloy

Autor: FOUREST, Thomas, Bouda, Pascal, Fletcher, Lloyd C., Notta-Cuvier, Delphine, Markiewicz, Eric, Pierron, Fabrice, Langrand, Bertrand
Přispěvatelé: DMAS, ONERA [Lille], ONERA, University of Southampton, Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 (LAMIH), Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Centre National de la Recherche Scientifique (CNRS)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Experimental Mechanics
Experimental Mechanics, Society for Experimental Mechanics, 2019, pp.1-14. ⟨10.1007/s11340-019-00559-3⟩
ISSN: 0014-4851
DOI: 10.1007/s11340-019-00559-3⟩
Popis: International audience; In the present work Image-Based Inertial Impact (IBII) tests are performed on Ti6Al4V material. The IBII test uses an impact on the edge of the specimen to generate a short pulse that loads the specimen. Three specimen geometries have been tested: a classic rectangular specimen, and two specimen geometries with stress concentrating geometries (i.e. a hole and notches) to enhance high levels of plastic strain. Full-field measurement of the acceleration and strain are successfully used in combination with the Virtual Fields Method (VFM) to identify the strain rate sensitivity parameter of the Johnson-Cook model. The strain/strain rate spectra covered by each specimen are analysed. Finally, the influence of the virtual field used in the identification process is discussed as well as the simultaneous identification of the Johnson-Cook model strain rate sensitivity parameter and the strain rate threshold parameter.
Databáze: OpenAIRE
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