Numerical Investigation of Time-Dependent Deformation and Fracture Evolution in Flawed Sandstone

Mechanics of Materials and Structures

Numerical Simulation Study of the Permeability Evolution of Sandstone during the Loading and Failure Process Based on FDEM

Rock failure under hydromechanical coupling is a complex process that has attracted considerable attention in deep underground engineering. In this study, a hydraulic coupling analysis method for rock loading and failure is developed based on the finite–discrete-element method (FDEM) combined with the grain-based mod...

Numerical Simulation of Crack Propagation in Concrete with Prefabricated Array Fractures Based on the Discrete Element Method

Concrete readily develops cracks under service loads, which poses severe risks to the overall safety of engineering structures. In this work, the discrete element method (DEM) integrated with PFC2D 5.0 numerical software is adopted to construct a mesoscale concrete numerical model containing pre-existing internal fract...

On phase-field regularization in dynamic fracture with brittle and cohesive formulations

Phase-field models of fracture are widely used for simulating crack nucleation and propagation, yet the role of the phase-field regularization in the dynamic regime is not fully understood and depends critically on how the damage variable is coupled to the displacement field. In this paper, we analyze three alternative...

Modeling Time-Dependent Rock Behavior: Simultaneous Validation of Creep and Stress Relaxation Using a Combined Viscoplastic Approach

This study investigates the time-dependent mechanical behavior of rocks and granular materials, challenging the conventional view of their response as time-independent. We present a rheological model that effectively simulates active loading, creep, and stress relaxation in geomaterials, validated through laboratory...

Investigating Fracture Behavior of Lattice Structures Using the XFEM and Equivalent Solid Material Model Techniques

This study aims to numerically investigate the mode I, II, and III fracture behaviors of additively manufactured degradable, bioplastic polylactic acid (PLA) lattice specimens. Numerical simulations were performed using the eXtended Finite Element Method (XFEM) based on the extracted PLA's mechanical and fracture mat...