ti-DEMPM

A high performance objected-oriented Discrete Element Method- Material Point Method (DEM-MPM) simulator in Taichi.

• developed by Shi-Yihao Zhejiang Universiy(In Progress)

Examples

Sphere impacts and penetrates into granular material

Stone Column using ti-DEMPM

Features

Discrete Element Method

• only spherical particles supported)

• Search Algorithm

  1. Sorted based
  2. Multilevel linked cell

Material Point Method

• Constitutive Model

  1. Linear elastic
  2. Drucker-Parger
  3. Nowtonian Fluid

• Integration Scheme

  1. USF
  2. USL
  3. MUSL
  4. GIMPM

• Stability features

  1. B-bar Method
  2. F-bar Method

DEMPM coupling

• Coupling Scheme:
  1. Penlaty Method
  2. Barrier Method

Future Work

1. Multisphere particles (clump)
2. GPU memory allocate
3. More constitutive models in MPM
4. Pre-processing (i.e., input obj files and JSON)

Install

1. Install essential dependencies

bash requirements.sh

2. Set up environment variables

sudo gedit ~/.bashrc

3. Add the installation path to bashrc file:

export tiDEMPM=/user_path/tiDEMPM

4. Run the test

python test.py

Acknowledgememt

Implementation is largely inspired by ComFluSoM.