Meshing a interior plastic component of a side door

Objective:

Mesh the Interior plastic component of the side door of a passenger vehicle with given quality criteria. After meshing assign thickness and check if the geometry is captured properly.

1. Take the Mid surface manually, mesh the geometry with quality.

2. Take Auto Mid surface and mesh the geometry with quality.

3. Use the combination ofboth auto mid surface and manual mid surface and then mesh the geometry with quality.

Procedure:

1. Clean the Geometric Errors:

# Open the plastic component of the side door in to ANSA.

# Check the topological errors for the given model through geometry checkup in the utility window or turn off the shadow mode to see single cons and triple cons.

# use NOT, Universal delete, coons, fitted, Hot points, Project, INTERSECT, CUT, PROJ.CUT commands to clear all topological errors.

2. Assign the Mesh and Quality Parameters:

# Assign the mesh and quality parameters as follows:

Element size: 5mm

• Aspect ratio: 3
• Skewness: 45
• Warping: 15
• Taper: 0.5
• Min. Length: 2mm
• Max. Length: 6mm
• Min angle Quad: 45
• Max angle Quad: 135
• Min angle tria: 30
• Max angle tria: 110
• Tria% : 15

3. Extract the mid surface:

# Extract the mid surface of the entire component by following any of the three steps:

A. Using Mid. Surface:

# Follow the sequence FACE > MIDSURFACE > CASTING and selectthe emtire model.

# By doing so the entire model is mid skinned and meshed in the FE mode but formed FE has abrupt surfaces with less time.

# check the mid surface formed by following the path FACES> CHECK MIDDLE SURFACE.

# to apply appropriate PIDs and thickness to the model use following path

FACE > MIDSURFACE > CALCULATE TICKNESS

B. Using offset and middle:

#using OFFSET and Middle options mid-surface is extracted.the formed surfaces are accurate and extracting the surfaces is more time.

# Mesh the entire model using BEST option in MESH GENERATION.

C. Mixing above both option:

# As the mesh generated using autogen mde is in FEmode, using following sequence to change the mesh FE into Geometry. MESH> ELEMENTS > To SURFACE.

# No abrupt Surfaces are changed by using OFFSET option and using EXTEND and INTERSECT join the surfaces.

From

to

4. Correct Mesh Quality errors:

# USing RECONSTRUCT, SWAP, SPLIT, MVSURF, PASTE, options correct all the grometric errors.

Conclusion:

The interior plastic component of the side door of a passenger vehicle with given quality criteria is meshed.