Project 2 - 2D meshing on the instrumental Panel

OBJECTIVE: Perform the 2-D meshing on the given automobile component which is the instrument panel by proper mesh parameters and quality criterias as follows.

CAD MODEL: Open ANSA and open the component file which is in "igs" as provided.

PROCEDURE:

The first step is to import the geometry to the ANSA workspace.

1. Topology & Orientation:

The topology is performed for broken faces using “Faces > Topo” command in the topology module.

And also, we have to give a proper Orientation to the Parent Component, using “Faces > Orient”.

The resolution of the CONS is improved using Auxiliaries > fine from topo module or perimeters >length from mesh module.

After done the topology cleanup, model will look like as shown in picture below.

2. Geometry Cleanup:

that the model is checked for geometry errors using “Check’s Manager > Geometry” command, in case of geometry errors such as missing cons can be corrected using “Hot Points > Insert/delete” , ”Faces > Elements > delete” for erase disturbed surfaces and then create a new one using “Faces > New” ,and also use Cons > Release > Topo command in TOPO module.

note: some errors fix by auto-fix option but for others we have to do it by manually,

3. Casting Mid-surface:

3.1 Mesh Length

Before beginning the meshing process the model is checked for the length between the two hot points since the require target length is 4mm so using “Classic-Mesh> Length>Perimeters/Macros” command it is set to 4mm. for the entire model.

3.2 Mesh Parameters

3.3 Quality Criteria

3.4 Casting

Since this is a complex model so, Casting option taken for taking Mid-surface / FE automatically. And after Align elements by Align Manager.

Auto generated FE by Casting Method

After Casting we can observe that some features are not have proper shape according to the parent component so, we have to check it and fix it Mannualy. (First we have to set the base elements proper then go for features.

4. Dog house:

Dog houses are critical area in the component. So, we have to recreate it reference form parent model and work manually, using join, delete disturbs elenents, create-curve, curve-middle, feat2curve, cons2curve, and then create new elenents using Mesh > elements > new, or Shell mesh > Fill, and after by using the align manager we correcting the auto_generated FE.

5. Align manage:

Align manager is used to ensure the automated generated mesh is align to middle of surface. by using the align manager we correcting the disturbed FE if any.

Also we can delete elements and recreate it by Shell Mesh > Fill option, & after that newly created elements are add to the Align Manager by right click on it > new > choose the option accordingly with Middle / Plane / Offset / Cylinder. After adding in Align Manager the elements faces/perimeters get position accordingly to the parent component position

The thickness assigned to the model can be viewed using utilities > quality criteria > presentation parameters > Draw shell as solid.

6. Final Model:

CONCLUSION:

In complicate models. Casting mid surface /FE & Align Manger effective used and element failure between triple cons having narrow regions cannot be eliminated.

LEARNING OUTCOME:

• Effectively extract Casting Mid-surface /FE.
• Assigning PID’s automatically in Casting Method.
• Rearranging construction lines.
• Geometry Check.
• Mesh refining.
• Align Manager uses.
• Assign Thickness to PIDs.