Week 12:Project-1-Meshing of Door Inner Panel Challenge

Aim :

• The meshing of the Door Inner Panel

Objective :

• with the Follow the Quality Criteria and mesh the following component and assign thickness:

  Target Element Length = 4 Units

  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	6 Units
  7	Min angle Quad	45
  8	Max angle Quad	135
  9	Min angle Tria	20
  10	Max angle Tria	120
  10	Tria %	10

Procedure:

import the side_door_panel.hm file into the hypermesh

File >> open >> browse the file and open.

after importing the geometry we can see so many ribs, locators, etc. So this component has different thicknesses for the different features.so rather than going to automidsurface we go for creating the offset for the surface.

then the quality criteria as per given the problem.

preferences >> criteria file settings

Then Click on By Topology.

Then repair the surface using the tool in the Quick edit panel.

toggle edges, replace points, add points, etc.

Geometry >> Quick edit

Then using defeature remove fillet surfaces.

Geometry >> defeature >> Surf fillet

as the fillet are less than 4 units it fails for minimum element criteria so removed all the fillets as shown above. Such a way removed all the fillet.

Then we split the whole component into four components.

Then we worked on separated components and created the midsurface by duplicating and offsetting surfaces in the middle.

first the distance between the surfaces and created the middle point and measured distance between the middle point and outer point.

F4 - Geometry >> distance >> two-point

selecting the surface duplicating them and offsetting them as the measured distance.

Geometry >> Surface edit >> Offset >> Enter the offset distance

The same procedure is done for all the surfaces to create the midsurface.

creating the same midsurface for all the ribs.

The same procedure was done for the ribs and surfaces.

as we created the offset for surfaces and ribs. ribs are not touched to the surface. the edges will show in red color which means free edges. Edges must be yellow in color.

for that first, we extend surfaces and trim them and delete the extra surfaces.

first, drag the surface along the vector

Geometry >> surface >> drag along with vector option (select the line and give the distance)

Trim the surfaces using the self-intersecting surface option

Geometry >> surface edit >> trim with surface/plane >> self intersecting surface (select the intersecting surface)

them delete the extra surfaces

as we know The area which is having more than 6mm thickness should not model in 2D.for such surfaces we model as shown below.

Finally offsetting all components and ribs we get the below component (midsurface)

Then mesh all the component

2D >> automesh >> mesh (target element size as 4 and mesh type as mixed)

as the we meshed for splited component we have check the connectivity and need to connect the nodes using the replace tool.

2D >> replace >> (select the nodes to replace)

as the we meshed for splited component we have check the connectivity and need to connect the nodes using the replace tool.

2D >> replace >> (select the nodes to replace)

assigning the thickness to the ribs and surfaces

first we organize all the ribs in one component

then created the properties for rib and gave thickness as 2 and for surfaces as 3units

and assign those properties to the all components

select the card image as shell and thickness is assumed

Result :

we created a midsurface and meshed the surfaces as per the given quality criteria.