Simulation of a three point bending test of a silicon crystal. The upper cylinder is pushed downward in a path-controlled trajectory. On contact, the induced stresses on the upper and lower surface are discernible. Tensile stresses are color-coded in red and compressive stresses in blue. Eventually, brittle failure of the silicon crystal is initiated. The simulation was carried out using SimPARTIX.
Discrete Element Method (DEM) simulations can be used to model the traction of a tire on a granular ground. The DEM force laws can be parameterized in order to represent various types of grounds ranging from sand over mud to snow. In the video a strong cohesion is used to make the particles very sticky. A constant torque is applied on the tire which is initially at rest. The particles are color coded according to their velocity magnitude ranging from blue (zero velocity) to red (highest velocity). First, the tire accelerates. But then, the tire comes to rest again. The sticky granular material is compacted by the tire motion which causes a torque slowing down the rotation. Some granular material remains in the groves of the tire profile.
The simulation was carried out using SimPARTIX.
The movie shows a detailed three-dimensional surface model of a human tooth. The tooth is rotating around its central vertical axis. During the rotation, a stream of size-distributed particles with constant initial velocity hits the surface of the tooth which resembles a dental polishing process.
The movie shows lamellas of different flexibility which are used to sweep cohesive granular matter by a lateral movement. The effectivity of the sweeping depends strongly on the rigidity of the lamella. Cleaning processes are applications for this simulation model.
