About Fastener Overrides | |
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For a given large assembly model such as a car, you might want to perform different types of simulations: stress analysis, crash simulation, and noise, vibration, and harshness (NVH) analyses. These simulations typically use different types of connection constructs and meshes. However, the physical real-world part of the connections might not change for the different simulation types. Fastener overrides let you share the physical real-world data across multiple FEM representations that use different fastener constructs.
Individual point fasteners and line fasteners can be created using manufacturing data such as locations, materials, and diameters. After this, you can create point fastener overrides or line fastener overrides to define different finite element constructs for these fasteners in different FEM representations to be used in different types of simulations. The finite element construct of a fastener determines how it is meshed—what kind of elements are created, how the elements are connected, and how surfaces are generated.
A fastener override cannot replace the material assigned in the individual point fastener or line fastener, since materials are considered manufacturing data that should not usually be overridden based on the type of simulation. A material assignment is always required for the constructs that need it: beam and solid hex.
A fastener override is a global feature that is applied to all point fasteners or line fasteners within the context of the current FEM representation. Any individual point fasteners or line fasteners created either before or after the fastener override will have the override properties applied.
A fastener override has the same Construct choices and Realization Options as the corresponding point fastener and line fastener dialog boxes.
When a fastener override has been defined, you will see the following message in any individual point fastener or line fastener dialog box:
The construct options are defined globally
You can click 
here to edit and change the override properties immediately.
Fastener Overrides in the Connection Manager
Fastener overrides are shown in both the Feature Manager and the Connection Manager. In the Feature Manager, fastener overrides are treated the same as any other feature.
In the Connection Manager, the point fasteners and line fasteners affected by an override are indicated in the description as follows:
Construct: Solid hex (Overridden)
The Connection Manager also includes an option to show a dedicated list of fastener overrides. You can open an override for editing from the Connection Manager; to do this, right-click on the override feature in the list and select Edit from the context menu.
You cannot deactivate a fastener override—the override feature must be deleted if it is no longer needed. If you delete a fastener override, all existing point fasteners or line fasteners will revert back to the construct (structure) and realization options originally defined.
Fasteners in a child FEM representation of the current (parent) FEM representation are not affected by overrides in the parent. To override the fasteners in a child FEM representation, you must switch to that FEM representation and create an override feature there.