Week 3 - 2D meshing for Sheet metal

Objectives

A cad model has been given and For the given Hood model, Take the mid surface for all the components after checking the geometrical errors and mesh the mid surface with the given element Quality criteria as given in the table.

 

This is the given cad model

Steps followed

• Topology is done as the first step to connect all the edges or single cons
• Geometrical checks are done for checking if there’s any geometrical error , if there is any error we can clear the errors by autofixing it , if there is any exceptional surfaces are present we can delete that manualy by checking in the property card list and select ‘show only ‘ to clear each error
• As we know that the given model is symmetric and we can extract the model into half and do the operations and mirror them after meshing , so the model is cut into half by getting a project cut through the center
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• For extracting the mid surface we need to measure the edges length, then by offset option a face is selected by feature area selection
• The half of the parent geometric length is given as the offset value , also the direction should be checked and the negative offset value should be given for the opposite angle

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• After extracting the midsurface , hide the parent geometry and save the midsurface in the property card list (ctrl+p)
• Remove the unwanted lines and clean up the model
• For the mesh generation we can go for classic mesh-best mesh by selecting the whole model also give the average mesh length as required
• Declare the quality parameters (Fn+f11) as required

 

• For improving the mesh quality the quality parameters should be satisfied, so that we will make changes in the mesh by ‘reconstruct’ , and avoid the tria elements which are facing opposite side and facing along the edges by the options in the elements such as ‘split ,collapse, swap etc
• After improving the mesh quality we can go for mirroring the model in the ‘ transform’ –‘copy ‘ then select the surface and unselect the unsymmetrical surface
• The final result of the model is given as .