FEM Fatale

A jello simulation using the Finite Element Method

Demo video link: https://youtu.be/rfcBbrljoug

Contributors

Connie Chang - Collisions and rendering
Marissa Como - I/O, tetgen, test cases, debugging
Zach Corse - Force calculations, K matrix calculations
Anantha Srinivas - Explicit and implicit integrators

Implementation details

• Fixed Corotated elastic model
• Tetgen file input reader
• Even distribution of mass between tetrahedron vertices
• Collisions using signed distance functions
• Forward Euler integrator
• (Work in progress) Backward Euler integrator
• OBJ output for rendering
• Rendering in Houdini

Implicit Integration

Class Diagram

Limitations and Struggles

• Implicit solver does not work...yet
• Instability in explicit solver as simulation goes on (>3 bounces)

Resources

• 2012 SIGGRAPH course notes on FEM
• Professor Kavan's Youtube videos
• MPM Snow Simulation paper for implicit
• TA's Josh and Ziyin
• Andre
• Professor Jiang