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A constitutive model for a rate and temperature-dependent, plastically anisotropic titanium alloy

Ruiz De Sotto, Miguel and Longère, Patrice and Doquet, Véronique and Papasidero, Jessica A constitutive model for a rate and temperature-dependent, plastically anisotropic titanium alloy. (2020) International Journal of Plasticity, 134. 102777. ISSN 0749-6419

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Official URL: https://doi.org/10.1016/j.ijplas.2020.102777

Abstract

Aircraft engine fan blades are notably designed to withstand impact loading involving large deformation, high strain rate, non-proportional loading paths and self-heating. Due to their high strength-to-weight ratio and good toughness, Ti–6Al–4V titanium alloys are promising candidates for the blades leading edge. An extensive experimental campaign on a Ti–6Al–4V titanium alloy provided in the form of cold rolled plates has been carried out. The thermo-mechanical characterization consisted in tension, compression and shear tests performed at various strain rates and temperatures, and under monotonic as well as alternate loading paths. A constitutive model has been accordingly developed accounting for the combined effect of plastic orthotropy and tension/compression asymmetry, nonlinear isotropic and kinematic strain hardening, strain rate hardening, and thermal softening. The constitutive model has been implemented as a user material subroutine into the commercial finite element computation code LS-DYNA. The performances of the model have been estimated by conducting numerical simulations considering a volume element under various loading paths as well as the specimens used for the experimental campaign.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Université Paris Sciences & Lettres - PSL (FRANCE)
Other partners > Ecole Polytechnique (FRANCE)
Other partners > SAFRAN (FRANCE)
Laboratory name:
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Deposited On:13 Jan 2021 13:02

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