The paper presents a description of the methods used to model rock as discontinuous
media. The objective of the work is to bring to the geomechanics community recent …

Over the last decade, researchers in the discontinuous deformation analysis (DDA)
community have dedicated a great deal of effort to document the accuracy of the method by …

The macro-mechanical behavior of crystalline rocks including strength, deformability and
failure pattern are dominantly influenced by their grain-scale structures. Numerical …

This study introduces the vector sum method into discontinuum-based methods by
considering the sliding vector and the stress state of the discrete block system. The sliding …

In the original formulation of DDA by Shi, a linear displacement function term is used. This
has the limitations of uncontrolled block and stress distortion due to rigid body rotation. In the …

We present an overview of the most popular state-of-the-art computational methods
available for modelling fracture in rock. The summarized numerical methods can be …

In this paper, a unified rock bolt model is proposed and incorporated into the two-
dimensional discontinuous deformation analysis. In the model, the bolt shank is discretized …

The numerical, discrete element, Discontinuous Deformation Analysis (DDA) method was
developed by Dr. Gen-hua Shi while he was working at the University of California …

An explicit discontinuous deformation analysis (DDA) that uses an explicit time integration
procedure and an explicit calculation of interaction forces between blocks is proposed to …

Computational modelling frameworks for masonry bridges range from highly simplified
methods to complex nonlinear finite element or discrete elements. In majority of cases the …