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In this article we formulate a stable computational nonlocal poromechanicsmodel for dynamic analysis of saturated porous media. As a novelty, thestabilization formulation eliminates zero-energy modes associated with theoriginal multiphase correspondence constitutive models in the coupled nonlocalporomechanics model. The two-phase stabilization scheme is formulated based onan energy method that incorporates inhomogeneous solid deformation and fluidflow. In this method, the nonlocal formulations of skeleton strain energy andfluid flow dissipation energy equate to their local formulations. The stablecoupled nonlocal poromechanics model is solved for dynamic analysis by animplicit time integration scheme. As a new contribution, we validate thecoupled stabilization formulation by comparing numerical results withanalytical and finite element solutions for one-dimensional and two-dimensionaldynamic problems in saturated porous media. Numerical examples of dynamicstrain localization in saturated porous media are presented to demonstrate theefficacy of the stable coupled poromechanics framework for localized failureunder dynamic loads.

A stabilized computational nonlocal poromechanics model for dynamic analysis of saturated porous media