Chapter 1 Principles and Implementation of DEM
Chapter 2 The Basic Structure of MatDEM
Chapter 3 Geometric Modeling and Material Setup
Chapter 4 Load Settings and Numerical Calculations
Chapter 5 Postprocessing and System Functions
Chapter 6 Basic Application of Geotechnical Engineering
Chapter 7 Rock-Soil Body Discrete Element Test
Chapter 8 Modeling of Complex 3D Models
Chapter 9 Numerical Simulations of Dynamic Action
Chapter 10 Multi-field Coupled Numerical Simulation
Appendix Properties, Functions and Frequently Asked Questions.

Intro
Foreword by Bin Shi
Foreword by Y.T. Feng
Preface
About This Book
Contents
About the Author
1 Principles and Implementation of DEM
1.1 Application and Numerical Calculation Software of DEM
1.2 Basic Principles of DEM
1.2.1 Contact Model of Elements
1.2.2 Connection of Two Different Elements
1.2.3 Time Step Iterative Algorithm
1.3 Damping Harmonic Vibration of Elements
1.3.1 Damping Force of Elements
1.3.2 Equation of the Damping Harmonic Vibration
1.3.3 Relation Between Vibration Period and Element Radius

1.3.4 Differences of the Element Motion
1.3.5 Damping and Optimal Damping Coefficient
1.4 Energy Conversion and Energy Conservation of DEM
1.4.1 Mechanical Energy of Systems
1.4.2 Calculation of Heat
1.4.3 Energy Conservation and External Work
1.5 Calculation Scale and Engineering Application Feasibility of DEM
1.6 Understanding and Solution to the Three Major Issues in DEM
1.6.1 High-Performance Matrix Computing of the Discrete Element Method
1.6.2 Quantitative Modeling Problem of DEM
1.6.3 Multi-field Coupling Method Based on DEM

1.7 Development and Prospect of MatDEM
References
2 The Basic Structure of MatDEM
2.1 The Software Foundation
2.1.1 The Operating Environment and Software Installation
2.1.2 The Windows Program for MatDEM
2.1.3 Operation and Termination of the Software
2.1.4 A Brief Introduction to the Application of the Software
2.1.5 A Brief Introduction to the Help File
2.2 The Program Structure of MatDEM
2.2.1 The Software Folders of MatDEM
2.2.2 The Hierarchical Structure of MatDEM
2.2.3 The Main Classes in MatDEM
2.3 Types of Element in MatDEM

2.3.1 Active Element, Wall Element, and Virtual Element
2.3.2 Fix the Degree of Freedom of Elements
2.3.3 The Rule of Numbering Elements
2.4 The Data Structure of MatDEM
2.4.1 The Property Arrays of Elements
2.4.2 The Neighbor Matrix and Connection Information Matrix
2.4.3 The Data Structure and Operation of Groups
2.5 The Contact Model Between Elements
2.5.1 The Linear Elastic Contact Model
2.5.2 The Hertz Contact Model
2.6 The Elastic Clump
2.6.1 The Principle of the Elastic Clump
2.6.2 Usage of the Elastic Clump
3 Geometric Modeling and Material Setup

3.1 Building a Numerical Simulation Box
3.1.1 Building a Packing Model
3.1.2 Creating an Empty Box
3.2 The Foundation of Modular Modeling
3.2.1 Modeling with a Structure
3.2.2 Filtering
3.2.3 ToolCut and Digital Elevation Model
3.3 Modeling Based on Digital Images
3.3.1 Importing a Binary Image to Cut a Model
3.3.2 Block Modeling by Importing a Color Image
3.4 Material Setting
3.4.1 Overview of Material Setting
3.4.2 Input the Material Properties Directly
3.4.3 Automatic Training of Materials
3.5 Balance Model