Constitutive equations for the cyclic behaviour of short carbon fibre-reinforced thermoplastics and identification on a uniaxial database

Louis Leveuf (1) , Libor Navrátil (1) , V. Le Saux (1) , Yann Marco (1) , Jérôme Olhagaray (2) , Sylvain Leclercq (2)

1 IRDL - Institut de Recherche Dupuy de Lôme
2 SAFRAN Group

A constitutive model for the cyclic behaviour of short carbon fibre-reinforced thermoplastics for aeronautical applications is proposed. First, an extended experimental database is generated in order to highlight the specificities of the studied material. This database is composed of complex tests and is used to design a relevant constitutive model able to capture the cyclic behaviour of the material. A general 3D formulation of the model is then proposed, and an identification strategy is defined to identify its parameters. Finally, a validation of the identification is performed by challenging the prediction of the model to the tests that were not used for the identification. An excellent agreement between the numerical results and the experimental data is observed revealing the capabilities of the model.

Keywords: Complex experimental database; Constitutive equations; Cyclic loading; Short fibre-reinforced thermoplastic; Thermodynamics of irreversible processes

Domains: Engineering Sciences [physics]; Mechanics [physics.med-ph]; Mechanics of materials [physics.class-ph]

Louis Leveuf, Libor Navrátil, V. Le Saux, Yann Marco, Jérôme Olhagaray, et al.. Constitutive equations for the cyclic behaviour of short carbon fibre-reinforced thermoplastics and identification on a uniaxial database. Continuum Mechanics and Thermodynamics, 2020, 32 (2), pp.403-420. ⟨10.1007/s00161-017-0616-4⟩. ⟨hal-01834116⟩