Dynamic VFM to Identify Viscoplastic Parameters. Analysis of Impact Tests on Titanium Alloy

Thomas Fourest (1) , Pascal Bouda (1) , Bertrand Langrand (1) , Delphine Notta-Cuvier (2, 3) , Eric Markiewicz (2) , Lloyd Fletcher (4) , Fabrice Pierron (4)

1 DMAS, ONERA [Lille]
2 LAMIH - Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201
3 INSA Hauts-De-France - INSA Institut National des Sciences Appliquées Hauts-de-France
4 University of Southampton

The present work aims at identifying an elastic-viscoplastic material behavior over a wide plastic strain and plastic strain-rate range (up to 0.1 and 1000 s−1 respectively), using the Virtual Fields Method. Image-Based Inertial Impact tests have been performed on the Ti6Al4V titanium alloy. The strain-rate dependency of the material has been identified with the results provided by these tests and compared to references.

Mots clés: Johnson-Cook; Titanium alloy; Virtual fields method; Full-field measurement; Viscoplasticity

Domaines: Sciences de l'ingénieur [physics]; Chimie; Physique [physics]

Thomas Fourest, Pascal Bouda, Bertrand Langrand, Delphine Notta-Cuvier, Eric Markiewicz, et al.. Dynamic VFM to Identify Viscoplastic Parameters. Analysis of Impact Tests on Titanium Alloy. 2019 SEM Annual Conference and Exposition on Experimental and Applied Mechanics, Jun 2019, Reno, United States. pp.101-103, ⟨10.1007/978-3-030-30098-2_15⟩. ⟨hal-03250093⟩