A two scale model of porous rocks with Drucker-Prager matrix: Application to a sandstone

作者：Lin J; Shao J F; Kondo D^*

来源：Mechanics Research Communications, 2011, 38(8): 602-606.

DOI：10.1016/j.mechrescom.2011.08.005

• Drucker-Prager matrix
• Ductile behavior
• Micromechanics
• Gurson-type model
• Porous rocks
• Triaxial compression tests

The present paper is devoted to a micromechanical model of porous rocks and its application to a sandstone. This original model takes advantage of a recent homogenization-based macroscopic yield function which couples Drucker-Prager type plasticity of the solid matrix and evolving porosity. Its formulation and implementation are described. Application to a Vosges sandstone shows that, except for very low confining pressures for which the mechanical behavior is quasi-brittle, the model predicts well the ductile behavior at moderate or high confining pressures (for which the pore collapse mechanism is expected to play a dominant role).

• 出版日期2011-12