Week 6-Meshing of Hood Challenge
AIM:
CREATE A MESH AND CLEAR ALL QUALITY ERRORS FOR THE GIVEN MODEL
PROCEDURE:
• Import file to hyperwork
• Delete sold surfaces
• Geometry cleanup
• Midsurface extraction
• Delete symmetry surfaces
• Defeaturing
• Assign quality criteria
• Meshing
• Quality error's deanup
IMPORT STEP FILE TO HYPERMESH
Import the STEP file to hyper work
For open
Goto » File » Import » Selct geometry » Change to STEP »Open the model » Click the model » Import
IMPORTING A MODEL
CHANGING TO STEP FILE
MODEL IMPORTED
DELETING SOLID FACES
Delete all solid faces for the given component
For deleting the faces
Goto delete» choose surface»choose solid beneath the surf»delete
SOLID FACE OF INNER PANEL
DELETING SOLID FACE
INNER PANEL SOLID FACE DELETED
Do same for angular position alternative component
Here area unit the some snapshots of alternative component
OUTER PANEL
HINGE REINFORCEMENTS
LATCH REINFORCEMENTS
GEOMETRY CLEANUP
Once the model is foreign move to pure mathematics cleanup simply to examine weather there any further surface or free edges or missing surface can gift or not
To check a errors
Goto visualize pane[,, Disable shared edges and every one except free edges
VISUALIZATION PANEL
Here no geometric error found
CREATE A MID SURFACE
Once the model is geometric error free then move to middlesurface
Now create a midsurface for a given components
Goto pure mathematics page » choose pure mathematics therefore choose midsurface » choose extraction possibility as SKIN OFFSET
Now return to car mid extraction command
Auto extraction»select surface »select displayed under surface»extract
EXTRACTION OPTION COMMAND
SELECTING DISPLAYED SURFACE
AUTO EXTRACTION WITH SURF
MID SURFACE OF INNER PANEL IS CREATED
Now RENAME the midsurface that we've extracted from the given component
Rename in line with its components
For rename
In left aspect of graphical half we will see one tab bar
Goto»model view»Rename»Midsurface one as INNER PANEL
RENAMING THE MID SURFACE AS INNER PANEL
Fallow same steps for all other components also
Create a mid surface and rename the parts
MID SURFACE OF OUTER PANEL
MID SURFACE OF HINGE REINFORCEMENT
MID SURFACE OF LATCH REINFORCEMENT
RENAMING BY ITS PARTS
DELETE SYMMETRY MID SURFACES
Both inner and outer pane have symmetry surfaces no here we will safe a time whereas deleting symmetry surfaces and once mesh and quality cleanup we will mirror those symmetry portion
To delete the surface
Goto delete no choose surfaces as Delete
DELETING SYMMETRIC SURFACE
SYMMETRIC SURFACE DELETED
DEFEATURING
In hypermesh, once you mesh a product for any quite analysis, the tip product may be a meshed product. Most of the days it therefore happens that, some little holes or some little fillets or some little radii area unit ignored that aren't useful and spare. we'd like to get rid of these unwanted options so as to get a final correct analysis. the method of removing these spare, non useful options is named de-featuring defeature all unwanted lines that is a smaller amount than the given minimum length.
For defeature
Goto fast edit a, Toggle all unwanted lines
DEFEATURING ALL UNWANTED LINES
ASSIGN QUALITY CRITERIA
Assign quality criteria for a given model
Goto preferences » criteria file setting » Enter the values » ok
QUALITY CRITERIA TAB
In this model a number of the fillet region is failing for minimum length therefore here we've produce a middle line and toggle all unwanted lines that is failing or minimum length
Goto lines command» Select mid line » Select 1st line middle click » Select 2nd line » Create
MID LINE IS CREATED
Now toggle ail unwanted lines that is failing for minimum length
MESHING
FEA stands for the finite component analysis which implies that parts area unit analysed and integrated over a part to derive the ultimate result. therefore in an exceedingly continous member, that really area unit everything ranging from a pin to automotive components. there area unit infinte nodes ANd its impracticable to stove an infinite eqaution. therefore meshing is administered in order that we will discreting that continous member into variety of finite nodes. and thence choose determination the equations. afterward interpolate the results for entire domain.
Mesh the given components with a given quality criteria
Goto geometry page » Select 2D» Select automesh » Select surface >> Create
MESHING COMMAND
IMPROPER MESH FLOW
For Better mesh flow we need to fallow some rules :
- Opposite tria's area unit avoided.
- Flat surfarce Vas ought to be avoided by merging them victimization split.
- Avoid tars almost hole region.
- Hole feature ought to be in even numbered.
- Avoid trigs at the perimeter Line.
- Avoid zig-zag mesh flow.
- Avoid rotating quads.
- Divides the massive surface into little components victimization split for meshing.
- Defeature the area which are going to fail the quality criteria.
PROPER MESH FLOW
For better mesh flow split the surface and create a mesh
INNER PANEL
HINGE REINFORCEMENT
LATCH REINFORCEMENT
OUTER PANEL
QUALITY ERROR'S CLEANUP
Clear all the standard errors that area unit failing for the given quality criteria
MAXIMUM ERROR
To clear this error we have
Goto quality index tab
Perform Swap. Split sleek etcc..OR
Remesh the actual space
QUALITY INDEX TAB
ERROR IS CLEARED
WARPAGE ERROR
This is Warpage error
To clear this error we have to use translate command by click Shift F4
TRANSLATE COMMAND
Select node to transfer and give orintation for the node and translate node by giving 0.05 magnitude
so that the error will clear
LEARNING OUTCOMES:
1. Learned how to fix the geometrical errors to clean up the geometry.
2. Learned how to create midsurface for the each component.
3. Learned how to fix quality errors.
4. Learned how to meshed as per the given quality criteria.
5. Learned how to reduce opposite trigs and rotating quad's.
RESULT:
The mesh is created for the given model as per the given quality criteria using HYPERMESH
CONCLUSION:
In the above hood model successfully generate mid surface and mesh the model as per the given criteria here i achieved 0.69 of tria percentage which is under the given criteria and with zero quality errors.