Mechanical characterisation of a viscoplastic material sensitive to hydrostatic pressure
| Autor: | Saïd Rja Fi Allah, Didier Picart, Abdelhake Bouchou, Michel Gratton, Camille Gontier |
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| Rok vydání: | 2009 |
| Předmět: |
Engineering
Hydrostatic pressure General Physics and Astronomy 02 engineering and technology Plasticity Mechanics Triaxial shear test Material Modelling 0203 mechanical engineering Ultimate tensile strength General Materials Science Tensile testing Viscoplasticity business.industry Mechanical Engineering Isotropy Structural engineering 021001 nanoscience & nanotechnology Damage 020303 mechanical engineering & transports Mechanics of Materials Hardening (metallurgy) 0210 nano-technology business |
| Zdroj: | European Journal of Mechanics-A/Solids European Journal of Mechanics-A/Solids, Elsevier, 2010, 28 (5), pp.935. ⟨10.1016/j.euromechsol.2009.03.002⟩ |
| ISSN: | 0997-7538 |
| Popis: | International audience; The present paper deals with the characterisation of the static mechanical behaviour of an energetic material all along its lifespan. The material behaviour is viscoplastic, damageable and sensitive to hydrostatic pressure. For such materials, existing models have generally been developed in the framework of transient dynamic behaviour. These models are not suitable for a static study. Therefore a specific experimental protocol and an associated model are developed. Characterisation is derived from both uniaxial compressive, tensile tests and tri-axial tests. Plastic behaviour is described by means of a parabolic yield criterion and a new hardening law. Non-associated plastic flow rule and isotropic damage complete the model. The performance of the model is illustrated through the simulation of various loading paths. |
| Databáze: | OpenAIRE |
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