Week 2 Bevel Gear Challenge

Objective:-

To perform grid dependency test on bevel gear with base mesh size of 6,5 and 4mm.

Theory:-

Grid independent is a very important issue in numeriacal simulation. Grid-independent means calculational results change so little along with a denser or looser grid that the fruncation error can be ignored in numerical simulation.

Basically a mesh convergence test should mean computing the solution on successively finer grids. The difference between two refinements is usually taken as a measure of the accurancy of the coarser of the two. Usually a calculation should approach the correct answer as the mesh becomes finer, hence the term grid convergence.

It is also known as mesh convergence test.

Geometry:-

Pre meshed geometry was used which was provided with the problem statement.

Material:-

Pre processing:-

Type:Frictional

Formulation: Augmented lagarange

Interface treatment: Adjust to touch

Joints:-

Revolute:

Small gear:-

Big gear:-

Meshing:-

case 1:- Base mesh 6mm and face meshing as 1.75mm

Element size: 6mm

Face sizing: 1.75

No of elements: 14127

No of nodes: 25738

Case 2: Base mesh 5mm and face meshing as 1.75mm

Element size:5mm

Face sizing: 1.75mm

No of elements: 14168

No of nodes: 25821

Case 3: Base mesh 4mm and face meshing as 1.75mm

Element size:4mm

Face sizing : 1.75mm

No of elements: 14684

No of nodes: 26736

Convergence & Time Increment Plot:

Total Deformation:-

Equivalent strain:-

Equivalent stress:-

Simulation Model:-

https://drive.google.com/file/d/1hje_Yc-sVfJhAUrCcP1KajmDwodOqQHO/view?usp=sharing

Conclusion:-

- From the above results from each case, we can see the percentage difference in stress is less in fine mesh.

-When it comes to difference in strain ,it is negligible.

- Total deformation is same in all the cases

- Because of there is negligible amount of difference in strain, we can go with 5mm mesh because of computational time is more in finer mesh(4mm).