Challenge

2D Meshing

AIM:

To clean the geometry, extract mid-surface and mesh with the given target element length, also assign thickness to the mesh elements using the Radioss profile.

OBJECTIVES OF THE PROJECT:

PROCEDURE:

PART-1 :
First step is to import the model, go to FILE > IMPORT > MODEL > OPEN > BROWSE > OK.
Now, check the model for any free edges and missing surfaces.
For free edges with small tolerance, go to GEOM > QUICK EDIT > TOGGLE > TOLERANCE = 0.2 > SELECT THE FREE EDGES, this will stitch the edges together.
For missing surfaces, go to GEOM > QUICK EDIT > FILLER SURFACE, this will create a face between the free edges.
Now, after all the geometry clean up we have to extract mid-surface.
Go to GEOM > MIDSURFACE > EXTRACTION OPTIONS > SKIN OFFSET > AUTO EXTRACTION > SURFS > DISPLAYED > EXTRACT.
Now, start meshing the mid-surface.
Before meshing go to PREFERENCES > CRITERIA FILE SETTINGS and enter the following values-
Target Element Length = 5mm

Minimum element Length = 3.5mm

Maximum Element Length = 7mm

This will set the quality criteria for the mesh.
Now, go to 2D > AUTOMESH > ELEMENT SIZE = 5MM > ELEMENT TYPE = MIXED > SURFS > DISPLAYED > MESH.
Go to VISUALIZATION > ELEMENT > BY ELEMENT QUALITY to check the elements failing for quality.
Now, in the TAB area, CREATE > PROPERTY > ID = PSHELL > THICKNESS = 0.91MM.
Now, assign this property card to the extracted mid-surface.

PART-2 :
First step is to import the model, go to FILE > IMPORT > MODEL > OPEN > BROWSE > OK.
Now, after all the geometry clean up we have to extract mid-surface.
Go to GEOM > MIDSURFACE > EXTRACTION OPTIONS > SKIN OFFSET > AUTO EXTRACTION > SURFS > DISPLAYED > EXTRACT.
Now, start meshing the mid-surface.
Before meshing go to PREFERENCES > CRITERIA FILE SETTINGS and enter the following values-
Target Element Length = 5mm

Minimum element Length = 3.5mm

Maximum Element Length = 7mm

This will set the quality criteria for the mesh.
Now, go to 2D > AUTOMESH > ELEMENT SIZE = 5MM > ELEMENT TYPE = MIXED > SURFS > DISPLAYED > MESH.
Go to VISUALIZATION > ELEMENT > BY ELEMENT QUALITY to check the elements failing for quality.
Now, in the TAB area, CREATE > PROPERTY > ID = PSHELL > THICKNESS = 2MM.
Now, assign this property card to the extracted mid-surface.

PART-3 :
First step is to import the model, go to FILE > IMPORT > MODEL > OPEN > BROWSE > OK.
Now, check the model for any free edges and missing surfaces.
For free edges with small tolerance, go to GEOM > QUICK EDIT > TOGGLE > TOLERANCE = 0.2 > SELECT THE FREE EDGES, this will stitch the edges together.
Now, after all the geometry clean up we have to extract mid-surface.
Go to GEOM > MIDSURFACE > EXTRACTION OPTIONS > SKIN OFFSET > AUTO EXTRACTION > SURFS > DISPLAYED > EXTRACT.
For the support legs defeature the surface by creating midline.
Go to GEOM > LINES > MIDLINES and then GEOM > SURF EDIT > TRIM SURF WITH LINES > TRIM.
Then toggle the remaining lines so that after meshing the elements will not fail.
Now, start meshing the mid-surface.
Before meshing go to PREFERENCES > CRITERIA FILE SETTINGS and enter the following values-
Target Element Length = 5mm

Minimum element Length = 3.5mm

Maximum Element Length = 7mm

This will set the quality criteria for the mesh.
Now, go to 2D > AUTOMESH > ELEMENT SIZE = 5MM > ELEMENT TYPE = MIXED > SURFS > DISPLAYED > MESH.
Go to VISUALIZATION > ELEMENT > BY ELEMENT QUALITY to check the elements failing for quality.
Now, in the TAB area, CREATE > PROPERTY > ID = PSHELL > THICKNESS = 1.8MM.
Now, assign this property card to the extracted mid-surface.

LEARNING OUTCOMES:

RESULTS:

CONCLUSION:

Hence, by performing this project we conclude that Mid-surface extraction, 2D shell meshing and assigning thickness to the mesh elements.

Ship work like this
in your own course.