BATCH MESHING HOOD AND FENDER IN HYPERMESH
OBJECTIVES :
To perform Batch mesh on Hood and Fender components under specified quality criteria and assign non-linear material property Steel to them.
QUALITY CRITERIA :
| S.N | Quality Criteria | Value |
| 1 | Aspect Ratio | 5 |
| 2 | Skewness | 45 |
| 3 | Warping | 15 |
| 4 | Taper | 0.5 |
| 5 | Min. Length | 2mm |
| 6 | Max. Length | 8mm |
| 7 | Min angle Quad | 45 |
| 8 | Max angle Quad | 135 |
| 9 | Min angle Tria | 20 |
| 10 | Max angle Tria | 120 |
| 10 | Tria % | 10 |
Target Element Length = 5mm
PROCEDURE :
1. HOOD ASSEMBLY
A. ORGANIZING :
1. Import the Hood.stp file to hypermesh under RADIOSS user profile.
2. Delete all the solids displayed.
FIG 1 : IMPORTED HOOD ASSEMBLY
3. Create Duplicate components for each components of hood and duplicate their surfaces using Tools > Organize command so that we can compare the midsurface generated with parent component after Batch meshing.
FIG 2 : ORGANIZING HOOD
B. BATCH MESHING :
1. Preferences > Mesh Parameters is used to set desired target element length and other clean up options. Save file.
2. Preferences > Quality Criteria is used to set fail values of elements. Save file.
3. 2D > Automesh > Batchmesh and set parameters file and criteria file while keeping connectivity and mesh.
4. Repeat the procedure for all components of hood.
FIG 3 : BATCH MESHING HOOD COMPONENTS
5. The mesh will be generated within minutes.
6. Midsurface and Quality Criteria is maintained exceptional.
FIG 4 : HOOD QUALITY INDEX OBTAINED AFTER BATCH MESH
C. ASSIGNING PROPERTY
1. Create a material card Steel and set card image as M2_PLAS_JOHNS_ZERIL for non-linear material property.
2. Set appropriate values in Material and Property card.
FIG 5 : ASSIGNING PROPERTY AND MATERIAL CARD
3. Right click mouse assign the property and material to the component.
DEMERITS:
1. Complex surfaces like inner panel of hood could not expect proper mesh flow.
2. Trias are large in number and need to rework a lot.
FIG 6 : IMPROPER MESH FLOW AT COMPLEX SURFACES
LINK : https://drive.google.com/open?id=1G9sT29xWAiS_z2MzmXWcKb8QGiaflHax
2. FENDER
A. ORGANIZING :
1. Import the Fender.igs.
FIG 1 : IMPORTED FENDER GEOMETRY
2. Delete the solids displayed.
3. Create an new component and move the surfaces displayed using TOOLS > ORGANIZE after duplicating.
FIG 2 : ORGANIZING FENDER SURFACES
B. BATCH MESHING :
1. Preferences > Mesh Parameters is used to set desired target element length and other clean up options. Save file.
2. Preferences > Quality Criteria is used to set fail values of elements. Save file.
3. 2D > Automesh > Batchmesh and set parameters file and criteria file while keeping connectivity and mesh.
4. Holes and plain areas are captured properly.
5. Midsurface is captured properly.
FIG 3 : BATCH MESHING FENDER COMPONENT
C. ASSIGNING PROPERTIES :
1. Create a material card Steel and set card image as M2_PLAS_JOHNS_ZERIL for non-linear material property.
2. Set appropriate values in Material and Property card.
FIG 4 : ASSIGNING PROPERTY AND MATERIAL CARD
3. Assign Property and material to the component.
DEMERITS:
1. Complex surfaces like ribs of fender could not expect proper mesh flow.
2. Trias are large in number and need to rework a lot.
3. Quality of elements failed at complex surfaces like hinges, ribs.
LINK : https://drive.google.com/open?id=1Yvf38B8nHO7iByAxgclpfE22rZKjF8vP