Week 3 - 2D meshing for sheet metal

Aim: Take the mid surface for all the components after checking the geometrical errors and mesh the mid surface with the given element Quality criteria.

 Quality Criteria 

1Target/Average length  5

2 Minimum Length 2

3 Maximum Length 7

4 Aspect 3

5 Warpage 15

6 Skewness 45

7 Jacobian 0.7

8 Minimum Quad Angle 45

9 Maximum Quad Angle 135

10 Minimum  Tria Angle 30

11 Maximum Tria Angle 120

10 Tria Percentage 15

Hood:

The Hood has 4 sub parts:

• the Inner Extract
• The Outer Extract
• Latch Reinforcement
• Hinge Reinforcement

The Inner Extract:

fixing the unchecked surfaces first

running the geometry checks

Tools-> checks -> geometry

The checks starts running when the execute button is clicked. we select the various checks we need rectify and the part on which the checks need to be performed

we will get a dialog box showing the error found by the check manager. we can try to auto fix the errors and manually solve the errors. After solving the errors we will try to extract the midsurface auto automid surface, since the hood is a sheet metal component the thickness will be uniform hence the extraction will be very easy.

Selecting the midsurface option from the faces diaog box and selecting the skin option, selecting the component/surface one want to extract the midsurface. make sure the green, red, blue area of the midsurace dialog box is properly defined

run the default geometry checks once again to remove of all the errors which might happen due to the offseting the surfaces. after that do manual visual inspection to reverify that quality of the midsurface. changing the leength to the target element size. As we cn see that the hood is symmetrical we can mesh only one side of the hood and reflect it to the other side .

Showing the side which iam meshing(i.e. the right side).      

Constuction lines which ae not required are suppressed and any new construction line are made accordingly.

Meshing:

Outer Hood Extract

running the geometry checks 

No errors are found by the checks 

extracting the midsurface using the skin option 

performing geometric cleanup, removing the excessive construction lines and constructing new ones where ever required.

Meshing

Using the best mesh opti

Hinge Reinforcement and Latch Reinforcement:

running the geometry checks. sinc no error popped up we can go with midsurfacing

the hood has been mehed according to the quality criteria provided

https://drive.google.com/file/d/1sYJZsEWPC411zq_Qdigrs6k2z_HyoBuI/view?usp=sharing