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Teaching Video of Discrete Element Method and MatDEM (Subtitles in English and Chinese)

Discrete Element Analysis in Geotechnical Engineering
- Theory and Application of MatDEM

   Speaker: Chun Liu, Nanjing University
   Sutitle group: Qiang Tang, Xiaowei Yang, Yao Zhu, Chenguang Zhu, Yehuan Huang, Liwei Liang

Part I Theory

Chapter 01 Principle and Implementation of Discrete Element Method, 55 minutes (离散元法的原理和实现)
   01.1 Application fields and basic principle of discrete element method (离散元法应用领域和基本原理)
   01.2 Damped harmonic vibration of element (单元的阻尼简谐振动)
   01.3 Three major issures of discrete element method (离散元法的三大问题)
   01.4 Interface and operations of MatDEM (MatDEM软件界面和基本操作)

Chapter 02 The Basic Structure of MatDEM, 61 minutes (MatDEM的基本结构)
02.1 Modeling by using struct data and function (利用结构体和函数建模)
02.2 Element type and elastic Clump (单元类型和弹性Clump团簇)
02.3 Introduction of help file and data structure of MatDEM (帮助文件简介和MatDEM的数据结构)
02.4 Filter of elements and post-processing commands (单元过滤器和后处理命令)

Chapter 03 Modular Modeling of MatDEM, 76 minutes (MatDEM模块化建模)
03.1 Automatic material training (自动训练材料) 
03.2 Digital elevation modeling and standard balance (数字高程建模和标准平衡)
03.3 Modeling process of BoxLayer example (BoxLayer示例建模过程)
03.4 Definition and use of filter and group (过滤器和组的定义和使用) 
03.5 Use of elastic Clump and application of boundary conditions (弹性Clump使用和边界条件施加) 
03.6 Balancing model, section display and data save (平衡模型、截面显示和数据保存)

Chapter 04 Example of MatDEM Modeling Process, 65 minutes (MatDEM建模过程示例)
04.1 Making struct data of balls and blocks (建立球和块体的结构体)
04.2 Modeling from an empty box (从空箱子开始建模)
04.3 Applying load and numerical simulation (荷载施加和数值模拟)
04.4 Using digital elevation data to define layers (利用数字高程数据来定义地层)
04.5 Using Tool_Cut and images to cut model (使用Tool_Cut和图像来切割模型)

Chapter 05 Modeling Essentials and Frequently Asked Questions, 45 minutes (建模要点和常见问题)

   05.1 Modification of element properties of specified group (特定组的单元属性修改)
05.2 Understanding of pressure platen and digital elevation modeling (压力板和数字高程建模的理解)
05.3 Setting of parameters of iteration calculation at the third step (第三步中迭代计算参数的设定)

Part II Application

Chapter 06 Pile-soil Interaction - Detailed Modeling Process, 132 minutes (桩土作用-建模过程详解)

   06.1 Understanding the effect of code through the example window (通过示例窗口来理解代码的作用)
06.2 Simulation box customization and element gravity deposition(模拟箱定制和单元重力沉积)
06.3 Gravity balancing of sample and data saving (样品重力平衡和数据保存)
06.4 Importing data and building soil layer (导入数据和建立土层)
06.5 Definition and application of materials (材料的定义和应用)
06.6 Building a pile model and embed it in the soil (创建桩模型并嵌入土层中)
06.7 Balancing operations and check of pile-soil model (桩土模型的平衡操作和检查)
06.8 Numerical simulation of pile pulling process (拔桩过程数值模拟)

Chapter 07 Microwave-assisted Rock Breaking - Mixing of Various Materials, 112 minutes (微波辅助破岩-多种材料混合)
07.1 Establishing the geometric model of microwave-assisted rock breaking (建立微波辅助破岩几何模型)
07.2 Cutting model and defining material (切割模型和定义材料)
07.3 Distinguish and set Clump of different materials (区分和设置不同材料的Clump)
07.4 Model balancing method and its effect (模型平衡方法及其作用)
   07.5 Check of model balancing status (模型平衡状态检查)
   07.6 Setting of cycle number and time step (循环次数以及时间步设置)
   07.7 Thermal expansion and fracture formation of particles (颗粒受热膨胀和裂隙生成)
   07.8 Modeling essentials of microwave-assisted breaking rock (微波辅助破岩要点说明)

20181014,Updated next week

Chapter 08 Tunnel and Ground Settlement - Structure and Soil, 60 minutes (隧道和地面沉降-结构和土体)

   08.1 Using custom functions to make a tunnel tube (使用自定义函数来制作隧道管片)
   08.2 Tunnel excavation and embedded tunnel tube (开挖土层和嵌入隧道管片)
   08.3 Tight contact between tunnel tube and soil (隧道管片和土层的紧密接触)
   08.4 Application of load and numerical simulation (施加荷载和数值模拟)

Chapter 09 Torsional Shear and Direct Shear Test - Discrete Element Test, 64 minutes (扭剪和直剪试验-离散元试验)

   09.1 Defining test parameters and making sample (定义试验参数和制作试样)
   09.2 Making torsion shear test box (制作扭剪试验盒子)
   09.3 Put the sample into the shear box (将试样放入剪切盒)
   09.4 Material setting and numerical simulation (材料设置和数值模拟)

Chapter 10 Triaxial Stress and Joints - Deep Rock Mechanics, 69 minutes (三轴应力和节理-深部岩石力学)

   10.1 Construction of a triaxial test box (真三轴试验箱的构建)
   10.2 Apply of triaxial stress (真三轴应力的施加)
   10.3 Using triangles and polygons to define joint faces (利用三角形和多边形定义节理面)
   10.4 Using Tool_Cut to define complex joint faces (利用Tool_Cut定义复杂的节理面)

739 minutes in total

Books related to the video will be published at the end of 2018, in both English (Springer) and Chinese.

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