Constraints and loads define the real-world environment you expect your model to encounter. Creo Simulate simulates the behavior of your model under loads you define when performing standard analyses and sensitivity studies for your model. Your model's optimal shape and mass can also depend on the loads you define. You can define loads on your model through the ribbon user interface or the Model Tree.

For structural analysis, a load is a force, moment, pressure, acceleration, velocity, or temperature that you apply to a portion of your model. For thermal analysis, a load is a heat condition applied to a portion of your model.