Challenge

Week 3

AIM : To check and clear the Geometrical error and to Mesh the given component.

Procedure:

After importing the model to ANSA using property manager seperated different parts
I have seprated the part as Bottom Hood(thickness=0.75mm), Top Hood(thickness=0.75mm), Middle part(thickness=1.2mm)
Right click on Bottom hood from property manager select show only, so that only one part can be accessed seperately
Do a Topology clean up and perform a geometry check
Right click on the errors and auto fix
After fixing all errors proceed with further operation
Next step is to extract the Mid surface, there are two ways to do the same , auto and manual mid surface extraction
For manual mid surface extraction, measure the thickness of the body and offset the face exactly to the middle
In auto mid surface extraction select >skin for sheet metal components, >casting option is used to solid components
I have used Auto mid surface extraction for Top and Bottom hood, because there was more crucial faces, in order not to miss any surface , used the auto mid surface extraction
Have used manual mid surface for middle part, because the body was not much complicated
Diffrence between this two extraction methods are, in auto mid surface extraction the body will be deleted automatically, in manual mid surface extraction the body can be retained
after extracting the mid surface, define the meshing parameter and assign the mesh quality criteria as given

Use Remove Double(Rmv dbl) option for symmetric component so the only one side of the component can be worked.
Moving to mesh module and give the element length as 5mm and create the mesh using best mesh generation method
Check for the quality criteria and try to fix the errors by split, reconstruct, fix quality etc
after meshing save the mesh as new Part ID by using "Set PID" option and give the name, thickness and material ID
Do the same procedure for all the parts
Make sure there are no OFF elements
after succesfully meshing all the parts assign the thickness to the mesh
assign the mesh thickness by going to Quality criteria>Presentation parameters>Draw shell as solid

Learning Outcomes:

Learnt how to use remove double option and how it is useful for symmetric components and understood its time saving which is a very important factor
To assign thickness
understood the need of SET PID
understood why we have to give thickness in Property ID bar
got familiar with commands like poj cut, split,slide, mark/unmark, reconstruct

Conclusion

Got to know the diffrent options that are available to rectify the errors,

Many challenges like this will build the confindence of students towards the software.

Ship work like this
in your own course.