Restraints are defined as surfaces that have 0 displacement. A simple way to think of them is that they “anchor” the object in place. At least 1 restraint is needed in every simulation to ensure that the model doesn't experience acceleration or movement.

A load is any force that acts on the model. In intact.design, these are vector forces, pressures, and gravity. At least 1 Force must be applied to the model for the simulation to run.

Once both of these constraints have been defined, the simulation can run. Basic scenarios are for those doing a simple simulation or those just starting to work with FEA. If a more complicated project needs to be completed, the advanced scenario page will walk you through how to simulate the scenario.