Summary of 3DEXPERIENCE Structural Model Creation: Point Fastener 2D-3D Connection Guide

This guide provides detailed instructions on how to create point fastener connections between 2D Shell mesh parts and 3D Solid mesh parts within a complex assembly modeling environment.

1. Role of Simulation Connections

Created within the Structural Model Creation app, these connections define the physical manner in which loads are transferred between components in a model.

• Load Path Definition: Determines how force flows physically between parts or meshes that may be separated or have different dimensionalities.
• Joint Modeling: Reflects the actual physical behavior of joints—such as bolts, welds, and rivets—rather than simple geometric bonding.
• Data Integration: Acts as the bridge between CAD design data and the FEM analysis model.

2. 2D-3D Hybrid Mesh Connection (Point Fastener)

The core challenge is overcoming geometric differences when connecting inconsistent mesh types (2D Shell vs. 3D Solid).

• Auto-Detection Feature: When a user selects the faces to be connected, the system automatically detects fastener locations within that range and establishes the links.
• Flexible Search Range: By using right-click options to set a search radius, users can accurately implement joints between parts that are slightly gapped or possess different dimensions.
• Coupling Technology: Appropriately distributes the load from a single point fastener to the surrounding 2D/3D elements to minimize artificial stress concentration errors.

3. Key Settings and Verification Steps

The guide outlines specific operational steps to ensure an accurate connection:

• Support Definition: Assign the geometry or mesh of the upper and lower components where the load will be transferred.
• Property Configuration: Input physical characteristics such as the fastener's diameter, material, and stiffness.
• Function Test: A validation procedure to confirm that the created fasteners are correctly seated in their intended positions and that no connections are missing.

4. Practical Engineering Value

• Efficiency in Complex Assemblies: Instead of modeling every bolt in 3D detail for large structures, using point fasteners balances analysis speed with accuracy.
• Responsiveness to Design Changes: If CAD data changes, the connection definitions are maintained or easily updated, significantly reducing re-modeling time.
• Improved Analysis Reliability: Prevents common connection errors that occur in hybrid models where 2D and 3D elements coexist.