A thermodynamically consistent framework for saturated viscoplastic rock-materials subject to damage

作者：Dufour N; Wong H^*; Arson C; Deleruyelle F; Pereira J M

来源：Mechanics Research Communications, 2012, 45: 15-21.

DOI：10.1016/j.mechrescom.2012.06.009

• Thermodynamics
• Viscoplasticity
• Damage
• Poromechanics
• Couplings
• Effective stress

The aim of this study is to build a thermodynamically consistent theoretical framework to model viscoplasticity and damage in saturated geomaterials. The induced anisotropic damage is represented by a second-order tensor. The key point of the model formulation is the definition of a "double effective stress", stemming from the concept of "damaged effective stress" (used in Continuum Damage Mechanics to couple damage and viscoplasticity in solids), and from the concept of "hydro-mechanical effective stress" (used in poromechanics to account for solid-fluid interactions). The dissipation potential is expressed as a function of the "double effective stress", which makes it possible to couple creep, fluid flow and damage in a consistent framework.

• 出版日期2012-10