Week 6-Meshing of Hood Challenge

Aim

To clean up geometry and to extract mid-surface and generate mesh on Hood using Hyper mesh.

Objective

Importing the model

clean up geometry

creating midsurface

meshing

quality criteria

 

Procedure

 

importing the model:

The format of the file is stp, then first of all select import solver deck command, choose import geometry type and select file type is STEP.

 file >> Import >> select the file >> Import.

now select the file from our folder and import it.

There are four different components

• Inner Extract
• Outer Extract
• Hinge Reinforcement Extract
• Latch Reinforcement Extract

Extracting mid-surface

To extract the mid-surface,

go to geom >> mid-surface >> select any extraction option >> select the surface >> extract.

Check for any geometrical errors

Now the Mid surface of all 4 component is obtained

Parting the Components

We can remove the unwanted lines inbetween the geometry and can properly create the lines for meshing.

To toggle lines

Geoms>>> Quick Edits>>> Toggle Lines

To create lines or trimming surface we can use two optoions

Geoms >>> Quick Edits >>> trim with Surface>> lines

Another method

Geoms >>> Surface edits >>> Trim surface with lines >>> Drag a cut line

Generating mesh

To mesh the component

2D >> automesh >> select the surface >> mesh.

Start the Meshing with the closed area with less free edges

Keep the Mesh flow as per geometry and create mesh with less tria elements

Now the meshing is done

Reflecting the Symmetrical Surfaces

 If the surface on both sides are symmetrical we can reflect the surface by using command

Tools>>> Reflect>>> Click on Elements>>> Selects the elements or surface >>> make duplicate>>> current geometry >>> select axis>>> Select node>>> Reflect

 

Quality criteria

Give the quality criteria for the elements in the criteria box

2D>>>rebuild Mesh>>>Quality Criteria

Give the required criteria

Then check for Quality index

2D >>> Quality index

If there are more elements out of quality  we use Rebuild option to make in good quality

2D>>>rebuild Mesh>>>select elements>>>Rebuild

Tools used for Getting good Quality

2D>>> Edit Element>>> create or Combile or Edit

2D>>> Smooth>>>iteration of 10>>> Smooth

2D>>> Quality index>>> Cleanup tools>>>>Element optimize

2D>>> Quality index>>> Cleanup tools>>>>Node optimize

2D>>> Quality index>>> Cleanup tools>>>>Combine tria Element

2D>>> Quality index>>> Cleanup tools>>>>Swap edges

Tools>>>Edges>>>Elements>>>Preview Equalance>>>Equalance

Tools>>>Check elements>>>>Duplicates

Final Meshing Result

CONCLUSION

The given car hood model is properly Mid surfaced and meshed as per given quality criteria.