SideFX and Emily Fung have recently shared a thorough guide for Houdini users.
The tutorial will guide you through the process of performing compression on a stack of solid objects, showing how you can harness the power of the updated FEM solver in Houdini 18. The new global-nonlinear (GNL) solver works with the new built-in Neo-Hookean material model.
The artist created an example with some gummy bears, replacing them with simple spheres for distribution purposes.
"The setup for this simulation is pretty straightforward, so we will go through it while focusing more on some specific tips that you can use when doing general FEM simulations."