Week 3

Week – 3 Challenge

Objective:

For the given component, check for the geometrical errors and mesh with the given element Quality criteria. After meshing the component the thickness has to be assigned.

Write a detailed report on your meshing process and also mention which method you used to extract the mid-surface along with the reason.

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

Note: All the elements in your model should clear the above-mentioned quality criteria and the features in the model have to be captured properly with good mesh flow. Depending upon this you will be awarded marks.

Procedure:

Open model Hood model_1.stp in ansa.

Check geometry of hood model by Checks > Geometry > Execute.

Extract midsurface by using automidsurface method. Steps for mid surface extraction: Faces > Mid surface > skin > select faces .

Midsurface extraction completed for individual parts separately as shown below.

By using Faces > Orient command kept all faces of parts on same direction.

Below images of parts after midsurface extraction:

1. Part_1

2. Part_2

3. Part_3

4. Part_4

5. Part_5

After completion of midsurfacer extraction of all parts went for meshing.

All edges of parts alter for 5 mm target length of shell. Perimeters > length > select edges > kept spacing 5

For meshing use tool available in mesh tab. Steps followed for meshing: Mesh generation > Best > select face .

Quality criteria for mesh check by using Hidden drawing style. Checked mesh element for below 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

Those element failed in quality criteria, repair by using shell mesh > reconstruct > select mesh near fail element.

After completion of meshing apply thickens in property tab.

Same procedure repeats for all below parts. Below images shows parts after meshing.

1. Part_1

2. Part_2

3. Part_3

4. Part_4

5. Part_5

Conclusion:

Below image shows Hood model after completion of meshing. All mesh element having within required quality criteria.