Modelling the plastic deformation of Ti6Al4V under dynamic loading

In this paper, a multiscale numerical method is presented with the aim to model the response of a Ti6Al4V sheet under explosive forming. The numerical modelling focuses on the accurate definition of the plastic deformation of the Ti6Al4V specimens based on the texture of the material. The viscoplast...

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Bibliographic Details
Published inMaterials science and technology Vol. 32; no. 16; pp. 1646 - 1653
Main Authors Kakogiannis, D., Coghe, F., Verleysen, P., Louar, M. A., Rabet, L.
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 01.11.2016
SAGE Publications
Subjects
Anisotropy
Explosive loading
Finite elements
Titanium alloy
Titanium alloy
Finite elements
Explosive loading
Anisotropy
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Summary:In this paper, a multiscale numerical method is presented with the aim to model the response of a Ti6Al4V sheet under explosive forming. The numerical modelling focuses on the accurate definition of the plastic deformation of the Ti6Al4V specimens based on the texture of the material. The viscoplastic self-consistent polycrystal model code (VPSC) is used as a link between macroscopic response and the underlying microstructure taking into account the viscoplastic deformation of the specimen. Comparison is made with experimental results. The Cazacu-Barlat (CB06) material model is used because of its capability to describe the yielding asymmetry between tension and compression and to take into account the anisotropic behaviour of the sheet. The study focuses on the evaluation of the material model parameters and on how these affect the structural response of the Ti6Al4V specimens under explosive loading. This paper is part of a Themed Issue on Euromech 570: Interface-dominated materials.
ISSN:0267-0836
1743-2847
DOI:10.1080/02670836.2015.1132617