Week 6-Meshing of Hood Challenge

Aim:

By extracting middle aurface mesh the componet ans mentioned quality criteria, mesh the component given below and assign thickness:

Target Element Length = 5 Units

S.N	Quality Criteria	Value
1	Aspect Ratio	5
2	Skewness	45
3	Warping	15
4	Taper	0.5
5	Min. Length	2 Units
6	Max. Length	8 Units
7	Min angle Quad	45
8	Max angle Quad	135
9	Min angle Tria	20
10	Max angle Tria	120
10	Tria %	10

latch_Middle Surface:

Here we will see the Meshing of different parts of Hood.
Hood consists four different components as below:

• Inner Extract
• Outer Extract
• Hinge Reinforcement Extract
• Latch Reinforcement Extract

procedure to exctract middle surface 

first delete the solide if the componet in the form of solide 

main mainue - Geom - midsurface - select (the component do this for all component )

now will get component in the form of surface then then do clean up manually by and keep the feature line for the get the proper mesh 

toggle all the unwanted line (Geom- quick edit )

apply automesh (mix)

now ckeck the the criteria 

apply the criteria (preference-criteia file setting)

go to the (main menue-2D -quality index)

check all the 

Latch Middle Surface: 

Result for the mesh of Latch Middle Surface: 

Hinge Middle Surface

do the same procedure as above the only step have to follow for theis component is due to symmetrical component have to reflect the element in the anothe component :

•  select the point on the component 
• Main menue -tool - reflect -element-dublicate -reflect 

Result for the Hinge Middle Surface:

Outer Middle Surface:

:

Result for the Outer Middle Surface:

Inner Middle Surface:

Result for the Inner Middle Surface:

Inference: 

• First thing to do with any given model is geometry cleanup and removing or toggling extra edges or lines.
• For good meshing, we should always take care of necessary lines and edges by which we can create easy and structured mesh.
• If there is small gap between two fillets, we can toggle one of the edges and simplified the meshing area to avoid minimum or
  maximum length elements.
• Important thing in meshing is mesh flow, which should be followed by the given geometry.
  We should avoid as much tria elements as possible.
• There should not be any rotational quads, which can disorient the analysis process and we can get poor results.
  We cannot avoid tria elements at the rounded or curved portions, so the elements at that area should be taken care with
  different splitting the surface.
• Where the elements are of poor quality, we can mask them any separately work on them to be corrected.
  Make sure that tria elements do not break the flow of the mesh.
• Thus, we can create good mesh with good arrangements of tria and quad elements and with proper flow and remeshing
  techniques