Week- 5 - Solid meshing

OBJECTIVES :

• Checking model for Geomerical Errors .
• Performing the GEometrical Clean up on the model .
• Meshing the Model with 2D shell Tria elements with Target Element Length of 1 mm .
• Checking for the minimum and maximum failure of the element .
• Creating the tetra mesh / Volume mesh using the 2D shell element mesh created .
• Checking the Volume mesh for the Tet collaps Quality .

CAD model :

Procedure :

• Rear view mirror model is imported and we can see single cons here , which we needs to taken care .
• For fixing this Single cons Topology opertaion is performed on the whole model .

Before Topology : After Topology :

• Now Geometrical check is done and we got 0 Geometrical errors .

• For creating the good volume mesh in the model we have to mesh the model with Ortho Tria and the Simple Tria elements for better surface capturing .
• Curved surfaces are meshed with the Ortho Tria elements and plane surfaces are meshe dwith the Simple Tria elements .
• Initially i have meshed Corner curved suirfaces with the Ortho Tria elements .

• And then Other Curved surfaces are also meshed with the Ortho Tria elements .
• Other all the plane surfaces are meshed with the Simple Tria elements .

• The secondary Casing surface of the Ball joint from mirror side is meshed with the Ortho Tria elements as this are curved surfaces .

• Prmary casing of the ball joint is also meshed with the Ortho Tria elements .

• But here at corner the Elements would have failed for the minimum length and hence i have created mid line at corner fillet as shouwn in below image ,

• Then Ball of the ball joint is meshed with Ortho Tria elements as ,

• Meshing of the other mirror arm's curved surafecs are meshed with the same Ortho tria elements .
• And plane surfaces are meshed with the Simple Tria elements .

• Now for creating the Volume mesh in the model we have to define the closed Volumes which ANSA have already recognised 4 closed Volumes automatically.
• Using the Tetra FEM Algorithum i have created the 3D tetra elements .

Results :

• Model with the 2D meshed ELements can be seen below with zero 2D shell elements failled for minimum Length and Maximum Length as ,

• Volume mesh created in the model can be seen below with zero tetra elements fails for the Tet collaps as ,

• Here we can see that the there isn't any Mesh bumps or kins and dips on the surfaces of the Volume meshed model .

Conclusion :

• Initially model is meshed with the 2D shell Elements with the Target Elements of 1 mm.
• Them Mesh Quality is checked for the minimum and maximum length failure .
• Them this 2D shell elemnets are used for the Volume meshing using the Tetra FEM Volume mesh.
• Volume Mesh is checked for the Tet Collaps .
• Model has cleared all the Quality criteria for 2D shell and 3D tetra elements as well .