Modelling of an Automotive IP Trim component by using ANSA

Objective:

• To extract the mid surfaces of the given geometry.
• To assign the thickness
• To mesh them according to the given quality criteria.

Procedure:

• Import the geometry.

• Perform topo for the given geometry to stitch the surfaces each other.

• Perform geometry check using check manager.

• Using auto fix and manual fixing clear all the geometric errors and again check the geometry.
• After clearing all the geometric errors extract the mid for the parent geometry by measuring the thickness of the component.
• Extract the mid of the parent geometry using faces offset option.

• After extracting the mid of parent geometry check for the unfilled surfaces as shown below and fill the holes with new existing surface.

• After filling the holes and unfilled surfaces use hybrid cut option and join the surfaces and make them as single surface as below.

• After filling and clearing all the geometric errors in the parent mid, Extract mid for all the ribs and dog houses.
• The mid for the ribs are extracted by creating a middle curve using curve middle option under curves and by using that curve create a new surface and extend it to the parent geometry as shown below.

• By selecting the curves around the rib extract the middle curve.
• By using the middle curve create the surface as below.

• Using the faces extend option extend the green line highlighted in the above picture to the parent geometry as shown below.

• Repeat the same procedure for all the ribs.
• Some of the ribs are extracted using faces middle option.

• The mid surface of the rib is to be extended to the parent geometry.

• Repeat the procedure and create mid for all the ribs and assign the PID for all the ribs.
• After extracting mid for the ribs extract dog houses.

• Dog houses are modeled as below.

• Extract the middle curves of dog houses as above.
• Create a new surface from the extracted curves as below.

• Repeat the same steps to model all the doghouse and assign PID for those.

• After extracting mid again check for geometric errors and clear all the errors.
• Now set the model for target element length.
• After extracting the mid surface for the entire component set the component for target element length i.e., 4mm.
• Insert the mesh parameters and quality criteria.

• Insert mesh parameters.

• Mesh the component by surface by surface to get proper mesh flow.
• Try to remove all the quality errors from the mesh.
• Draw the shell elements as solids.

Outcomes:

• Different methods of extracting mid are understood.
• FE modelling of the component is understood.

Results and conclusion:

• The mid surface for the given plastic components is extracted successfully.
• All the components have meshed according to the given quality criteria.
• The thickness is assigned for the given plastic component successfully.