Numerical simulation of forerunning fracture in saturated porous solids with hybrid FEM/Peridynamic model

In this paper, a novel hybrid FEM and Peridynamic modeling approach proposed in Ni et al. (2020) is used to predict the dynamic solution of hydro-mechanical coupled problems. A modified staggered algorithm adopted solve system. one-dimensional consolidation problem solved first validate approach, both δ-convergence mr-convergence studies are carried out determine appropriate discretization parameters for model. Thereafter, fracturing rectangular dry/fully saturated structure with central initial crack simulated under mechanical loading fluid-driven conditions. fracture case, fixed surface pressure applied on upper lower surfaces near position force its opening. fluid injection operated at centre rate. Under action external injection, forerunning behavior observed dry