Discontinuous deformation analysis (DDA) simulations of crack propagation, branching and coalescence in brittle materials under dynamic loading

C Li, Y Ning, X Liu - Theoretical and Applied Fracture Mechanics, 2022 - Elsevier
Cracking in brittle materials under dynamic loading is widely encountered in engineering.
The discontinuous deformation analysis (DDA) is a numerical method initially proposed to …

Distributed-spring edge-to-edge contact model for two-dimensional discontinuous deformation analysis

P Yu, Y Zhang, X Peng, G Chen, JX Zhao - Rock Mechanics and Rock …, 2020 - Springer
Edge-to-edge contact is a fundamental contact type in blocky systems. In two-dimensional
discontinuous deformation analysis (2D DDA, and hereinafter DDA for short), an edge-to …

Modified predictor‐corrector solution approach for efficient discontinuous deformation analysis of jointed rock masses

F Zheng, YF Leung, JB Zhu… - International Journal for …, 2019 - Wiley Online Library
The high computational costs associated with the implicit formulation of discontinuous
deformation analysis (DDA) have been one of the major obstacles for its implementation to …

[图书][B] Discontinuous deformation analysis in rock mechanics practice

YH Hatzor, G Ma, G Shi - 2017 - taylorfrancis.com
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 …

[HTML][HTML] Overview of Discontinuous Deformation Analysis and Its Prospects for Intelligent Modelling

GH Shi - Intelligent Geoengineering, 2024 - Elsevier
Since its proposal in 1985, the Discontinuous Deformation Analysis (DDA) has developed
into a powerful tool for simulating the mechanical behaviour of rock masses and other …

Discontinuous deformation analysis for ellipsoids using cone complementary formulation

H Fan, D Huang, G Wang, F Jin - Computers and Geotechnics, 2020 - Elsevier
A new computational framework for discontinuous deformation analysis (DDA) of ellipsoidal
particles is developed by taking full advantage of the geometric convexity of the ellipsoid. To …

Investigating the effect of external forces on the displacement accuracy of discontinuous deformation analysis (DDA) method

MH Shahami, AY Bafghi, MF Marji - Computers and Geotechnics, 2019 - Elsevier
Blocks of different sizes are formed in a typical rock mass and affect its stability. The size
difference in between the blocks consisting a rock mass is also important from the rock …

Variational inequality‐based particle discontinuous deformation analysis

H Fan, JF Wang, H Zheng - International Journal for Numerical …, 2019 - Wiley Online Library
Orienting the circular and rigid particle medium, the variational inequality‐based
discontinuous deformation analysis (DDA) is established. In the proposed DDA, the global …

Dynamic modeling of sphere, cylinder, cone, and their assembly

H Fan, J Wang - Archives of Computational Methods in Engineering, 2020 - Springer
Dynamic simulation of revolved solids plays an important role in many fields. Aiming at the
lacks of solutions in some key aspects, this study establishes governing equation of motion …

Improved Gauss Seidel based projection–contraction algorithm for the mixed complementarity problem in contact problem

Y Zeng, H Zheng, Y Liu, B Yang… - International Journal for …, 2022 - Wiley Online Library
Abstract The GSCP (Gauss–Seidel based projection‐contraction) algorithm has been well
established in solving elastoplastic mixed complementarity problems (MiCPs) or other …