When you select one or more regions using the Model Change Manager, you activate model change for those regions. You can then choose a general analysis step in which one or more activated regions are removed. Once a region is removed in a step, it will remain removed for all subsequent steps unless you choose to add it back in. The most common use case is to use model change to remove a region once in a simulation. However, you can remove and add back a region as many times as required. The current state (removed or not removed) of each activated region is specified independently. Model change can be used to model manufacturing processes in which one or more regions of a part is removed. For example, in an additive manufacturing process it is a common practice to remove the support structures from the part after the print is complete. If there is any residual stress in the part, it might deform after the supports are removed. The model change feature can be used to simulate this process. | |||||||||