Challenge

Week 3 - 2D meshing for sheet metal

HHitesh Kumar21 Oct 2022

Objective-2D meshing for sheet metal

For the given Hood model, Take the mid surface for all the components after checking the geometrical errors and mesh the mid surface with the given element Quality criteria. (Refer the table Below for the Quality criteria)

S.No	Quality Criteria	Value
1	Target/Average length	5
2	Minimum Length	2
3	Maximum Length	7
4	Aspect	3
5	Warpage	15
6	Skewness	45
7	Jacobian	0.7
8	Minimum Quad Angle	45
9	Maximum Quad Angle	135
10	Minimum Tria Angle	30
11	Maximum Tria Angle	120
10	Tria Percentage	15

Solution

First open the file by going to File-Open

Now,After opening the file select the whole component and do Topo option (it connect the cons if they are not connected)

Now,these are the components we have to work on

1.Hinge

Now,check for any geometrical errors by going to Tools-checks-geometry Or search check on search box

now,click on execute and if there are any errors just right click on them and click on fix.

Now,check the thickness by going to Utilities-measure-Nodes

Now,Extract the Midsurface by using Offset (in Faces column)

I gave the value -0.6 because its thickness is 1.20 and used minus sign for direction.

Also on right bottom corner option there is a option property set it to auto create (by using this option it will create the mid-surface in different property ).

After Extracting the Mid-surface

Now,Move on to MESH

Before moving to Mesh we have to Follow some steps.

Step1. Give the Quality Criteria and Mesh parameter.

Step2. Give Perimeter size for the component by selecting Length in perimeter and select the component and give perimeter 5(according to element size)

step3.the holes should have even no of edges by number-select- click on middle-mouse button

Step4. Now to Generate mesh go to Mesh Generation-Best-click on middle-mouse button

done the mesh using best option and now to clear these errors by following option

Reconstruct in Shell Mesh

Smooth in Shell Mesh

Used Split,swap option in Elements to remove trias.

Now, I used Transform Option to mesh other hinge by searching Transform-Copy

then select entity

Now select the Symmetry -default symmetry -Apply-then ok

Transform Done

Mesh is Completed for Hinge.

2.Inner extract

Now,check for any geometrical errors by going to Tools-checks-geometry Or search check on search box

now,click on execute and if there are any errors just right click on them and click on fix.

Now,check the thickness by going to Utilities-measure-Nodes

Now,Extract the Midsurface by using Offset (in Faces column)

I gave the value -0.375 because its thickness is 0.75 and used minus sign for direction.

Also on right bottom corner option there is a option property set it to auto create (by using this option it will create the mid-surface in different property ).

Midsurface is Extracted.

Now,Move on to MESH

Before moving to Mesh we have to Follow some steps.

Step1. Give the Quality Criteria and Mesh parameter.

Step2. Give Perimeter size for the component by selecting Length in perimeter and select the component and give perimeter 5(according to element size)

step3.the holes should have even no of edges by number-select- click on middle-mouse button

Step4. Now to Generate mesh go to Mesh Generation-Best-click on middle-mouse button

done the mesh using best option and now to clear these errors by following option

Reconstruct in Shell Mesh

Smooth in Shell Mesh

Used Split,swap option in Elements to remove trias.

delete irrelevent lines

Before After

Used Paste Option and Smooth

before After

Mesh is Done.

3.latch extract

Now,check for any geometrical errors by going to Tools-checks-geometry Or search check on search box

now,click on execute and if there are any errors just right click on them and click on fix.

Now,check the thickness by going to Utilities-measure-Nodes

Now,Extract the Midsurface by using Offset (in Faces column)

I gave the value -0.6 because its thickness is 1.20 and used minus sign for direction.

Also on right bottom corner option there is a option property set it to auto create (by using this option it will create the mid-surface in different property ).

Mid-surface is done

Now,Move on to MESH

Before moving to Mesh we have to Follow some steps.

Step1. Give the Quality Criteria and Mesh parameter.

Step2. Give Perimeter size for the component by selecting Length in perimeter and select the component and give perimeter 5(according to element size)

step3.the holes should have even no of edges by number-select- click on middle-mouse button

Step4. Now to Generate mesh go to Mesh Generation-Best-click on middle-mouse button

Use below option to improve the Mesh.

Reconstruct in Shell Mesh

Smooth in Shell Mesh

Used Split,swap option in Elements to remove trias.

Mesh is Done

4.outer extract

Now,check for any geometrical errors by going to Tools-checks-geometry Or search check on search box

now,click on execute and if there are any errors just right click on them and click on fix.

Now,check the thickness by going to Utilities-measure-Nodes

Now,Extract the Midsurface by using Offset (in Faces column)

I gave the value -1.35 because its thickness is 2.7 and used minus sign for direction.

Also on right bottom corner option there is a option property set it to auto create (by using this option it will create the mid-surface in different property ).

Now,Move on to MESH

Before moving to Mesh we have to Follow some steps.

Step1. Give the Quality Criteria and Mesh parameter.

Step2. Give Perimeter size for the component by selecting Length in perimeter and select the component and give perimeter 5(according to element size)