New methodology for gear mesh stiffness

[murilloabs]

Implementation of the new Gear Mesh Stiffness methodology, which includes both spur and helical gears. Automatically calculating the stiffness value used.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 97.63314% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.96%. Comparing base (07a5a63) to head (1dcd86a).
⚠️ Report is 245 commits behind head on main.

Files with missing lines	Patch %	Lines
ross/multi_rotor.py	98.13%	3 Missing ⚠️
ross/gear_element.py	87.50%	1 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1209      +/-   ##
==========================================
- Coverage   82.91%   74.96%   -7.96%     
==========================================
  Files          39       38       -1     
  Lines        8247     8858     +611     
==========================================
- Hits         6838     6640     -198     
- Misses       1409     2218     +809     

Files with missing lines	Coverage Δ
ross/gear_element.py	92.00% <87.50%> (-0.86%)	⬇️
ross/multi_rotor.py	93.63% <98.13%> (+5.00%)	⬆️

... and 5 files with indirect coverage changes

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[raphaeltimbo]

Hi, @murilloabs ! Thanks for the PR.

I have only some minor comments.

First, could you please add some tests to check the GearElement class?
You could create a test_gear_element.py to the test folder and add some tests there. These tests could be based on one of the examples available in the tutorial.

Regarding the tutorial, here you added a command to add a local path to sys:

If you could please remove this since it is related to your local environment.
A better approach would be to install ross locally going to your ross folder and using pip install -e .
This will add the ross folder to your path and you won't need to use the sys.append in your scripts.

[murilloabs]

I have noticed a minimal mistake at the contact ratio formulation. I have swapped radius with diameter of the gear. I have corrected this mistake and the pytest was not updated. Now, I already update the pytest and I made the test files: test_gear_element.py and test_multi_rotor.py.