Week 3 - 2D meshing for sheet metal

OBJECTIVE :

To perform mid surfacing for all the components after checking the geometrical errors and mesh the mid surface with the given element Quality criteria.

PROCEDURE :

• The given geometry model is imported in the ANSA platform using the open option and the model given shall be given in any format.
• The model soon after importing is checked for the number of components present in it and a Property ID is to be assigned to the respective midsurface of the components.
• The geometry is now checked for topology failures using the check geometry option in which the the visible geometry are analyzed and the failures are listed.
• The topology failures are cleaned up by deleting the failing faces such as needle faces, unchecked faces, triple cons etc.
• After deleting the failing faces, topology cleanup is performed and hence the geometry is made proper.
• Then the midsurfacing of the geometry is performed using the offset faces option in the Topo section. The thickness of the parent geometry is measured and half the thickness is taken as the offset distance.
• Negative sign is added to the offset distance if the direction of offset is opposite to the required direction.
• The surface offset is done and the mid surface is assigned to a separate PID. This procedure is followed for every component individually.
• The perimeter length is assigned to the model by providing the average element size in the length option of perimeter section.
• As the mid surfacing is done, now the given quality criteria for meshing is fed into the model and the mesh parameters is also assigned.
• Now the meshing of the component is performed by dividing the geometry into desired shapes such that the mesh flow is proper.
• The geometry is divided using the cut option in faces/macro section and thus the meshing is performed simultaneously.
• If any component is found to be symmetrical, one half is alone meshed and the entities are copied symmetrically using the transform option.
• Thus the given component is done for midsurfacing and meshing under the given quality criteria.

MODEL IMAGES :

CONCLUSION :

Thus the mid surfacing for all the given components after checking the geometrical errors and meshing of the mid surfaces with the given element quality criteria is done successfully.

NOTE :

Though after fixing the off elements it's showing as if 8 off elements are present but it's occuring due to the software bug.