Geometry cleanup and meshing of a car hood design

OBJECTIVE:

To create manual mid surface of the given component and mesh the component and assign thickness.

QUALITY CRITERIA:

Target Element Length = 4mm

S.N	Quality Criteria	Value
1	Aspect Ratio	5
2	Skewness	45
3	Warping	15
4	Taper	0.5
5	Min. Length	2mm
6	Max. Length	6mm
7	Min angle Quad	45
8	Max angle Quad	135
9	Min angle Tria	20
10	Max angle Tria	120
10	Tria %	10

PROCEDURE:

1. Import the model in HyperWorks.

2. Section the surfaces into 4 parts as per convenience.

The surfaces divided are shown below.

Rename the 4 parts as 1, 2, 3, 4.

Perform topology cleanup , defeaturing so as to get the mid surface

3. Offset the surfaces to create mid surface of the above 4 components.

Mid surfaces so created by offseting are sown as below.

The surfaces will need trimming and cleanupinorder to create a mid-surface which is copy of parent component

4. Create a criteria File and a parameter file following the quality criteria.

5. Auto mesh using batch mesh all upload the criteria file and parameter file so saved.

6. Tweek the mesh to get a proper mesh flow which follows the max qualitity criteria...

7. create 3 properties with thickness 1mm 2mm and 2.8mm.

8. Assign the thickness to the midsurface component 1mm to MS1, 2mm to MS2, 2.8mm to MS3 and MS4.

COCLUSION:

1. Leart to create Mid-Surface of complex geometry with non uniform thickness

2. Learnt to mesh as per given quality criteria

3. Learnt to assign thickness to the geometry.