Particle-particle contact law examples: bonding, cohesion, and plastic/adhesive normal contact, generally shown as a "with vs. without" comparison against a baseline Hertz/Hooke contact.
bonded_particles/— clumps of spheres connected by breakable cohesive bonds (normal/tangential force and torque) fired into a box.cohesion_sjkr/— gravity-packed spheres compared with and without SJKR cohesion added to a Hertz/history contact.hooke_hysteresis/— gravity-packed spheres compared using plain Hooke contact vs. Hooke with plastic hysteresis and adhesion.