About CAD curvature abstraction

Use the CAD Curvature Abstraction option in the 2D Mesh dialog box to improve quadrilateral meshes on relatively thin-walled parts with curvature, such as automotive body panels. When you select this option, the software uses a curvature analysis to improve the quality of the quadrilateral elements in your model by preserving the representation of part features during the geometry abstraction process.

The abstraction process analyzes groups of adjacent faces that have similar curvature. Where possible, the software merges those individual, adjacent faces together. For smaller, sliver faces within the model, such as tiny faces along fillets, the software more aggressively merges those faces with adjacent faces. This process aims to preserve the boundaries of features while eliminating very small faces that are interior to features. This results in fewer small elements in the mesh that violate the specified Minimum Element Length value.

Note:

To make the CAD Curvature Abstraction check box active, you must select one or more meshes. If you select faces, the option is inactive.

CAD Curvature Abstraction requirements

The CAD Curvature Abstraction option is available when the following conditions are met:

• The associated part or idealized part file is loaded.

• The selected body is a sheet body that is fully meshed. The CAD Curvature Abstraction option is not valid for solid bodies.

• You have not used any geometry abstraction commands, such as Merge Edge or Split Face, to modify the geometry.

• The selected mesh is a free mesh comprised of quadrilateral elements.

Where do I find it?

Application	Pre/Post
Prerequisite	A FEM file as the work part and displayed part
Command Finder	2D Mesh
Location in dialog box	Mesh Parameters group

How do I

Create a 2D free mesh

Learn more

2D free meshing

Using pre-defined favorite settings to create 2D meshes

Understanding the 2D meshing methods

Quadrilateral only meshing

Understanding free mapped meshes

Understanding free mesh generation

Fixing triangular element interior angle quality issues

Midnode placement for parabolic elements

Creating a separate mesh for each face or polygon body

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

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About CAD curvature abstraction, Simcenter 3D 2021.1 Series

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