Shear and mixed mode fracture in disordered saturated porous media

Abstract eng:
We investigate shear fracture and mixed mode fracture in inhomogeneous fully saturated porous media with a 2D central force lattice model. For this purpose we adopt the extended Biot’s theory. The bars of the lattice break only under traction. This breaking process is simulated with a continuous damage model where after a partial failure event spring elements get a new failure threshold sampled from a uniform distribution. We investigate avalanche behaviour of the breaking events as well as the pressure evolution and the existence of pressure jumps linked to the breaking events in the disordered medium. It is found that the behaviour under pure shear loading is brittle while under mixed mode loading overall elasto-plastic behaviour is recovered as was previously observed under biaxial tension loading.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket