Assignment 1-2D Meshing Challenge

Objective:-

• To do a complete geometry clean up
• Fix all the geometry issues ( missing surfaces, Unnecessary free edges, etc)
• To Extract a mid surface of the modal using the auto-mid tool
• To mesh the extracted mid-surface using given quality criteria
• Fix all the failing elements using appropriate tools
• Assign thickness to the mid-surface by creating a property and material for the mid surface

Introduction:-

• Received three different models
  • practice
  • Clip repair
  • Mounting bracket
• All of them are quite small in size, all of them had few geometrical issues
• All of them had few holes which were smaller than (5mm diameter) 
• And had a few filler surfaces which were smaller than 3.5mm which is our minimum element length
• The meshing procedure for all the models was almost similar.

MODAL 1 RECEIVED 

MODAL 2 RECEIVED 




MODAL 3 RECEIVED

Theory:-

• After importing the model first I turned on the topo mode to see the geometry lines and edges clearly 
• Then after that, I observed the model very precisely for geometrical errors and missing surfaces
• So after observing the model few missing surfaces were found
• So to fix those geometrical errors I used the required tools such as to create the missing surfaces 
• I used Surface--> Ruled tool, Spline tool, surface filler tool
• Then to fix the unnecessary free edges, I used the toggle tool from Quick edit
• After Fixing all the geometrical errors by using appropriate tools
• Then extracted the mid-surface out of that model
• by using an auto-mid tool 
• which automatically created a new component as middle surface 
• Then by using the Distance tool I measured the thickness between different points
• To check the thickness of the model \
• Then I created a property then assigned the thickness as the thickness measured by the Distance tool
• And similarly created a material
• then Assigned both property and material to the mid-surface 
• then after this changed the criteria file setting as per given values
• then by using the automesh tool I meshed the m\id-surface by using a 5mm element size
• then I enabled the element colour mode by element quality so that the failing elements become visible
• then after checking for the failing elements I fixed all the failing elements by using the Quality Index tool 
• After fixing all the failing elements enabled the element representation type to 2D detailed representation

MODAL 1:-

After Complete geometry Clean up

After Extracting the mid surface

Few holes were less than 5mm so eliminated all those holes by using spline tool

Completely Meshed with zero failing elements

After thickness is assigned 

MODAL 2:-

Complete Mid surface without any errors

Completely meshed with zero failing elements

MODAL 3:-

While measuring the thickness of the model using Distance tool

Using the auto mid tool for mid-surface extraction

Few Fillets were less than 3.5 which was the minimum element length so to avoid failing of elements at the fillets region

I used the Midline tool to create a midline between two lines of Fillets then after getting the midline I used surface trim with lines tool

to project that midline as a con over the mid surface

and then used the toggle tool to suppress the edges of the fillets 

that's how I eliminated the fillet surfaces 

Complete Mid-Surface with zero geometrical errors

Model after complete mesh and with zero failing elements 

Procedure of creating a new property and material

Model after thickness is assigned and 2 D detailed element representation is enabled

Conclusion:-

• Learned how to perform geometry clean up on a model
• Learned how to create missing surfaces using the required appropriate tool
• Learned how to resolve the free edges and the triple cons 
• Learned how to extract a mid-surface out of the given model
• learned how to mesh the mid surface
• learned how to eliminate all the failing elements