Week 3 - 2D meshing for sheet metal

Objectives:- 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

Procedure:-

1. Firstly, Import the stp file.

Click the Open Tab

Model are as follows:-

1. Outer extract:-

2.Inner extract :-

3.Hinge reinforcement extract:-

4.Latch reinforcement extract:-

2.Now, select the outer extract model and for the geometry error.

Command: {Tool>>Checks>>Geometry>>Execute}

Now click execute tab.

If any errors occure it shows erroe in red colours and if no error found it shows green tick in status bar.

3.After that , delete the surface as the model is symmetrical so we have to cut our model.

Command:- {Utilities>>delete>>select the surface>>enter}

4.Now, take mid-surface.

Command:- { Topo>>Faces>>Mid-surface>>skin>>select surface>> }

And Toggle the unnecessary lines-

''Toggle lines are in orange colour.''

5.After that go to the mesh and set perimeter size.

Command:- { Mesh>>Perimeters>>Length>>Perimeter>>select all surface>>length= 5>>ok}

Select the size as per our target size.

6.Now set Mesh Parameter & Quality Criteria.

7.Now, mesh the model.

Command:- { Mesh>>Mesh Generation>>Free>>select surface}

Fail element that are shown above.

So now go to shell mesh and select improve

Select fail element area and press middle mouse button or enter tab.

Here , mesh generation is complete.

8.As we delete symmetric part of the model now refect the model:-

Command:- { Utilities>>Transform>>copy>>select all surfaces>>enter>>symmetry>>apply>>ok}

9.Final Model:-

Outer Extract:-

10.Now, Follow the same procedure for all parts.

Inner Extract:-

Hinge reinforcement extract:-

Latch reinforcement extract:-

Conclusion:-

In this challenge , we learn about mid-surfacing and mesh generation as per the quality criteria and with proper mesh flow.