Week 5 Challenge : Surface wrap on Automotive Assembly

AIM: SURFACE WRAP ON AUTOMATIVE ASSEMBLY

PROBLEM STATEMENT:

For the given models, check for the geometrical errors and delete surfaces which are unwanted for Surface wrap as shown in the videos. After clearing geometry, Merge all 3 models and perform surface wrap.

Target length for Wrap = 3 mm
Write a detailed report on steps followed to finish this challenge.

PROCEDURE:

> Open the file.

FILE > OPEN > DOWNLOADS > SELECT THE FILE NAME > OK

>DELETE ALL THE UNCHECKED SURFACES.

.right click on unchecked surafces.

.click on show only.

.select all the unchecked surfaces using box selection.

.delete them all.

> After deleting the unchecked surafaces delete all the unwanted surafces those are present in the cad file unwanted surafces such as ring ike structure, Donut like structure,collapsed surfaces, remove all the single cons, tripple cons,in all the three files engine,transmission box,gear box.as shown in image.

>There are two methods to delete all the unwanted surfaces.

1) By selecting all the unwanted surfaces one by one and delete them one by one.

2) By selecting all the wanted surfaces using Boolen operators NOT and INOT option and then hide them and then delete all the unwanted surfaces using box selection.

To check whether the selected item is exact or not use wire frame model.

Delete all the ring like struture.

After deleting all the unwanted surfaes in the Engine part now open the tranmissiion box and delete all the unwanted surfaces those are present on that cad file.

Tripple cons are present due to extra ring like structure present inside the surfaces to delete those ring like structure first hide the outer casing using BOOLEN OPERATOR NOT and then use universal delete option select the ring like structure and then delete them.

After perfoming all the topological cleanup at outside surfaces now perform the topological cleanup in the gear box.

Open the gear box file in ANSA tool.

Right click on unchecked surfaces then go to show only option then select all the unchecked surfaces using Bobox selection and then delete them.

Delete all the ring like structure present inside the surfaces.

Also check the selection using wire frame model.

After performing all the Topological cleanup in the gear box assembly Merge all the three files using the layout.

FILE > MERGE > SELECT OTHER TWO FILES > MERGE PARAMETER WINDOW OPENS CLICK ON OK.

Close all the opening using the layout.

TOPO > FACES > NEW > FITTED > SELECT SUFACES > OK

After closing all the openings now perform the surface wrap using the layout as shown below.

CLASSIC > ELEMENTS > WRAP > CONSTANT LENGTH > DOUBLE CLICK ON PARAMETER > ASSIGN NEME > ENTER TARGET LENGTH AS 3MM > ENTER MESH AS TRIA >OK

Before assigning the parameters for the content section delete all the dummy pids present using the compress tool.

After all the dummy pids assign the parameter in content section.

CLASSIC > OCTREE > WRAP > CONSTANT LENGTH > DOUBLE CLICK ON CONSTANT WRAP OCTREE > CONTENT(GOING TO SELECT SURFACES ) > SELECT EVERYTHING USING CTR+A > PRESS GREEN ARROW BAR > OK .

Right click on constant wrap octree > click on run > it will take some time and after that surface wrap will perform.

LEARNING OUTCOMES:

In case of surface wrapping geometrical cleanup is not required but in case of surface meshing geometrical cleanup is required.

In case of surface wrapping there is no need for covering the internal surfaces. Tipple cons, single cons, unwanted surfaces those are present inside the body can be ignored for the geometrical cleanup.

The only concern for performing surfae wrapping, all the open surfaces must be closed,open surfaces from where internal volumes may got access will be closed,because surface wrapping created only the unique volume while in case of surface meshing it will create multiple volumes.

Surface wrapping is less accurate for the curaved surfaces , as surface meshing will provide the more accurate result then the surface wrapping for the curved surfaces.

Surface wrapping takes less time for performing the wrap over the surafces while the surface meshing takes more time to perform the meshing,so for getting the approximate result in less time prefer surface wrapping.

Surface wrapping creates the volume where flow analysis can be performed at both external and internal side.

RESULT:

surface wrapping has been performed over the surface with the Target length of 3mm and it will varies between 2.5 to 3.5 mm.