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Image-based inertial impact test for characterisation of strain rate dependency of Ti6Al4V titanium alloy

Image-based inertial impact test for characterisation of strain rate dependency of Ti6Al4V titanium alloy
Image-based inertial impact test for characterisation of strain rate dependency of Ti6Al4V titanium alloy
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.
Ti6Al4V, image-based, inertial impact test, strain rate, titanium alloys
0014-4851
235-248
Fourest, T.
99027376-c174-47fa-88e3-10cf20e8b514
Bouda, P.
1027e51c-52a6-4312-a4bb-d8a51355eda1
Fletcher, L.C.
48dca64b-f93c-4655-9205-eaf4e74be90c
Notta-cuvier, D.
7fedc6e2-6e8f-4b95-9f4c-f05b7e88422f
Markiewicz, E.
4613516d-05ba-4e06-91c9-fceefa05ac88
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Langrand, B.
37329eaa-5ae4-4464-b0d4-6261882804e2
Fourest, T.
99027376-c174-47fa-88e3-10cf20e8b514
Bouda, P.
1027e51c-52a6-4312-a4bb-d8a51355eda1
Fletcher, L.C.
48dca64b-f93c-4655-9205-eaf4e74be90c
Notta-cuvier, D.
7fedc6e2-6e8f-4b95-9f4c-f05b7e88422f
Markiewicz, E.
4613516d-05ba-4e06-91c9-fceefa05ac88
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Langrand, B.
37329eaa-5ae4-4464-b0d4-6261882804e2

Fourest, T., Bouda, P., Fletcher, L.C., Notta-cuvier, D., Markiewicz, E., Pierron, F. and Langrand, B. (2020) Image-based inertial impact test for characterisation of strain rate dependency of Ti6Al4V titanium alloy. Experimental Mechanics, 60 (2), 235-248. (doi:10.1007/s11340-019-00559-3).

Record type: Article

Abstract

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.

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Accepted/In Press date: 9 October 2019
e-pub ahead of print date: 26 November 2019
Published date: 2020
Keywords: Ti6Al4V, image-based, inertial impact test, strain rate, titanium alloys

Identifiers

Local EPrints ID: 437438
URI: http://eprints.soton.ac.uk/id/eprint/437438
ISSN: 0014-4851
PURE UUID: d3c63567-4726-4b33-8ea5-9d83ac544959
ORCID for F. Pierron: ORCID iD orcid.org/0000-0003-2813-4994

Catalogue record

Date deposited: 30 Jan 2020 17:37
Last modified: 26 Nov 2021 05:17

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Contributors

Author: T. Fourest
Author: P. Bouda
Author: L.C. Fletcher
Author: D. Notta-cuvier
Author: E. Markiewicz
Author: F. Pierron ORCID iD
Author: B. Langrand

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