MPM Elastic

Elastic materials react to stress (compression or decompression) by allowing deformation to happen and as soon as the stress or pressure is gone it rearranges its molecular structure to its original state. You could also say we just described a bouncing rubber ball.

This MPM material is great for recreating rubber like materials with just a few basic settings.

Stiffness - defines the overall “rigidness” or stiffness of the material. As always, all MPM simulation are heavily dependent on Cell Size. A proper balance between Cell Size and Stiffness prevents explosive behavior or and simulation artifacts. Explosive behavior can always be counteracted by increasing the amount of simulation sub-step in the solver.

Volume Conserv. - this is one of the most important parameters to affect the look or behavior of the simulation. A theoretical value of 0.5 (not recommended) will keep the volume constant even when the material experiences stretching. Lower values will allow the material to freely stretch and distribute stress within the material's volume.