This post is a continuation of the Getting Started with Abaqus series

Introduction

Your 3D model might have tiny details like small surfaces, edges, holes, and rounded corners. These details might be important for the design, but not for running a simulation. Including them can make the simulation mesh low quality.

Imagine the mesh as a net draped over your model. Tiny details act like wrinkles in the net, making it hard to get a smooth fit. To get an accurate mesh, you'd need a very intricate net, which takes a lot of time and computer power to create.  If these tiny details don't affect how the part behaves, you can safely ignore them. 

This process of removing unnecessary details is called defeaturing, and there are tools in various 3DEXPERIENCE apps to help you do this.

Let’s get an overview of Defeaturing:

1. Import the neutral CAD format file into 3DExperience platform.
2. Double-click the 3D representation to switch to a part level app
3. Using the compass, search for and select Simulation Model Preparation

The Simulation model preparation app provides tools to:

• Check the geometry of your model and make necessary repairs before generating a mesh
• Removes features from your geometry and simplify the meshing process.
• Simplify the mesh that is generated from your model by idealizing the geometry
• Create new geometry as lines, points and surfaces to help improve the mesh
• Visualize the geometry to find regions in the model that needs to be repaired.

• Meshability

  In this post we will focus on “Defeature” tool

  Defeaturing:

• This tool is used to cleanup unnecessary logos, fillets, holes, drafts and chamfers from your models.

  

1. You can use this tool to clean up unnecessary logos that have no role in the structural simulation and will instead cause discrepancies in meshes. Likewise, fillets, holes, drafts and chamfers from your model.
2. Instead of individually removing them, you can specify a filter and rest will be taken care off by the .

3. For example, you can create a fillet filter to remove all fillets within a radius range.

   Note: Other filters: Diameter range for holes, size range for logos, chord length for chamfers, angle range for drafts.

   

   Edu