Week 8 Worm Gear Challenge

Title: Worm Gear Challange

Objective:

 For this challenge, we have have to perform a transient structural analysis on a worm gear assembly. For the academic version, you need to cut the gear by half so as to bring the model within limits. For the challenge, you have to rotate the worm so as to get to almost end of the half cut and get results for Equivalent stress, Equivalent elastic strain and the total deformation in the model. You can use a finer mesh while performing the challenge and submit a well formatted report with appropriate images.

Case Setup:

1.Material:

Material used for Worm as well as Gear is Structural steel.

2. Geometry:

Open spaceclaim and  make Gear half so as to run with finer mesh in Acadamic version of ansys.

3. Contacts:

There is only one contact between worm and gear.

We are applying Frictionless contact for this.

4.Joints:

Apply Revolute joints Ground to body for both worm and gear as well.

5. Meshing:

Meshing is done with Adaptive sizing and the Mesh size is changed to 1.5mm.

6.Analysis settings:

15 steps are used for this simulation with initial time step of 0.2s and minumum time step of 0.2s and Max time step of 0.5 sec for 1st step.

Minumum time step of 0.2s and Max time step of 0.5 sec for all remaining steps. Carryover timestep is on except 1st step.

7.Joint load:

Rotation is applied to Worm of about 750 degrees in 15 steps as Input.

8.Results:

Conclusion:

Tabulate the results below as per simulation:

Case	Max.Equi Stress(Mpa)	Max.Equi Strain(mm/mm)	Total deformation(mm)
1	1287.9	0.0064632	7.2652

1.Max equivalent strees induced is 1287.9 Mpa on the gear tooth.

2.Max equivalent strain induced is 0.0064632 on the gear tooth.

3.Total deformation of 7.2652mm is induced on the gear tooth.