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

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.
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https://hal.archives-ouvertes.fr/hal-02862490
Contributor : Patrice Longère <>
Submitted on : Tuesday, June 9, 2020 - 3:33:41 PM
Last modification on : Wednesday, June 24, 2020 - 4:18:54 PM

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Miguel Ruiz de Sotto, Patrice Longère, Véronique Doquet, Jessica Papasidero. A constitutive model for a rate and temperature-dependent, plastically anisotropic titanium alloy. International Journal of Plasticity, Elsevier, 2020, pp.102777. ⟨10.1016/j.ijplas.2020.102777⟩. ⟨hal-02862490⟩

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