Week 12:Project 2-Meshing of Rear Wheel Holder challenge

AIM

To mesh the given Rear Wheel Holder by following the given Quality Criteria and to assign the corresponding Property to the elements.

OBJECTIVE

To Extract Midsurface

To Mesh the component

To Assign Property

Target Element Length = 5units.

S.N Quality Criteria Value

1 Aspect Ratio 5

2 Skewness 45

3 Warping 15

4 Taper 0.5

5 Min. Length 2 Units

6 Max. Length 8 Units

7 Min angle Quad 45

8 Max angle Quad 135

9 Min angle Tria 20

10 Max angle Tria 120

11 Tria % 10

PROCEDURE

importing the geometry

The format of the file is stp, then first of all select import Model command, choose import geometry type and select file type is MODEL.

file -- Import – Model -- Import.

now select the file from our folder and import it

Geometry Cleanup

Check that the given model surface is perfect and free from errors like free edges, duplicate surfaces and missing surfaces.

If any defects are found then the required geometry cleanup needs to be done using the various tools such as toggle edge, filler surf, replace points etc. available under the quick edit panel.

Geom----quick edit

Midsurface extraction

Since the Given component is a plastic component

There are some variable thickness

So to measure the thickness

Click on the main menu bar Select-----Geom-----distance.

So midsurface is created by offset command

Next go to the main menu bar select-----Geom----- Surface Edit.

Select surface edit click on Offset ----- Select ----- surf ----- Duplicate ----- Current component ----- Offset.

Using the ‘midline’ option in lines tool, a midline can be drawn on the surface of the rib.

Geom-----lines-----Midline-----select lines-----create

we have to repeat this for extracting the midsurface for all the ribs

Now the Midsurface of the component is obtained

Criteria File Setting

Meshing of midsurface

The given quality criterias need to be specified using the criteria file editor before meshing the model.

Go to Preference-----Criteria file setting---- Give input of the criteria given

Then click 2D-----Automesh-----enter mesh size---click on the midsurface-----click mesh.

Check if any elements are failing for any of the given quality criterias. If any element is found to be failing the given quality criteria then the cleanup tools are used to correct them.

Now the meshing is done

ASSIGNING THICKNESS.

After meshing, the elements have to be assigned the required thicknesses. All of the elements are assigned to different component collectors based on the thickness of their parent geometry and they are renamed according to their thickness.

Right click tab area-----create-----property

OTHER TOOLS USED

Geoms---Midsurface---Final edit tools---Select the surface--- extract

Select ----- Geom -----Surface Edit ----- Extend ----- Extend over edges ----- Line to extend over ----- Surface to extend ----- Extend

RESULT

Thus the meshing of the given Rear Wheel Holder by following the given Quality Criteria and to assign the corresponding Property to the elements.