A non-isothermal consolidation model for gradient-based poroplasticity

• Autores: Mroginski, Javier Luis; Etse, Guillermo; Ripani, Marianela
• Año de publicación: 2015
• Idioma: inglés
• Tipo de recurso: documento de conferencia
• Materia: Porous media; Gradient theory; Thermodynamic consistency; Non-isothermal
• Institución: Universidad Nacional del Nordeste

Fil: Mroginski, Javier Luis. Universidad Nacional del Nordeste. Facultad de Ingeniería; Argentina.
Fil: Etse, Guillermo. Universidad Nacional de Tucumán. Centro de Métodos Numéricos y Computacionales en Ingeniería; Argentina.
Fil: Etse, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Laboratorio de Mecánica Computacional; Argentina.
Fil: Mroginski, Javier Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Laboratorio de Mecánica Computacional; Argentina.
Fil: Ripani, Marianela. Universidad de Buenos Aires. Laboratorio de Materiales y Estructuras; Argentina.
In this work, the thermodynamically consistent non-local model for concretes subjected to high temperatures originally proposed by Ripani, et al (2014) [1] is extended, in order to evaluate the failure behavior of partially saturated quasi brittle materials like soils. This new formulation follows the gradient-based poroplastic theory proposed by the authors [2], moreover, introduces the temperature as an additional variable of the internal characteristic length. The non-local effect is achieved assuming that the internal variables are the only ones of non-local character. Hence, both q and qα will be considered as arguments in the free energy. On the other hand, in order to reproduce the softening behavior of partially saturated soils the saturation degree as well as the confinement level should be considered in the internal characteristic length calibration. Finally, the FE implementation of this enriched constitutive theory with selective C1 and C0 interpolation functions for the internal variables and the kinematic fields, respectively, is discussed.