Week 3 - 2D meshing for sheet metal

Aim:

To perform the mid-surface generations, geometry check-ups & execute the meshing operation of the given part in line with the given quality criteria parameters.

The below values are given from the quality criteria parameters.

ANSA Phases:

Procedure:

Step-1:

Importing the model:

Open the given file named as “Hood model_1.stp” in ANSA platform.

It consists of 5 parts (Part1, Part2, Part3, Part4 & Part5).

PART1:

PART2:

PART3:

PART4:

PART5:

Step-2:

Geometry cleanup:

The above parts are checked for geometry cleanup.

Tools-->Checks-->Geometry

Then clean up the errors from all the parts by auto fix option & topo tools option like a new face, delete & topo to eliminate all errors.

Step-3:

Mid surface Generation:

Manual mid surfaces are generated by selecting the faces of parts by offset option by half the distance of the thickness.

After the mid-surface generation & again check for errors.

Step-4:

Assigning properties & thickness in properties:

PART1 – thickness=0.75mm

PART2 – thickness=0.75mm

PART3 – thickness=1.2mm

PART4 – thickness=1.2mm

PART5 – thickness=1.2mm

Step-5

Meshing:

Enter the target length & minimum target length values in the mesh properties window.

Quality Check:

Enter the quality criteria parameters in the quality criteria window.

Click OK

Then follow the below steps to get the best meshing output.

• Modules-->Classic Mesh-->Mesh generation-->best algorithm for keeping the best mesh quality.
• Modules-->Classic Mesh -->shell mesh-->improve for improving the existing mesh quality.
• Modules-->Classic Mesh -->shell mesh-->Reconstruction for reconstructing the mesh on FEM & Macro areas.
• Modules-->Classic Mesh -->shell mesh-->Smooth for smoothing the mesh on selected FEM & Macro areas.
• Modules-->Classic Mesh -->Elements-->Split for splitting the shell & solid elements into smaller by selecting the edges/nodes to remove failed elements & trias.
• Modules-->Classic Mesh -->Elements-->Split for splitting the shell & solid elements into smaller by selecting the edges/nodes to remove failed elements & for changing trias position.
• Modules-->Classic Mesh -->Grid-->paste to remove failed elements & for changing trias position.

After mesh generation completion:

Part-1:

Part-2:

Defeaturing option done in Hemming region:

Part-3:

Part-4:

Part-5:

Learning Outcomes:

• Learned multiple features available in ANSA platform
• Importance of Geometry cleanup, Quality criteria parameters & PID options.
• Gained Knowledge from Mesh generations by using multi algorithms & various mesh refining/improving tools.

Conclusion:

The meshing of “Hood_model.stp” has been successfully completed with the given quality criteria parameters.