Challenge

Week 8 Worm Gear Challenge

Aim:-To perform a transient structural analysis on a worm gear assembly.

Objectives:-

Cut the gear by half
Rotate the worm so as to get to almost end of the half cut
Results for Equivalent stress, Equivalent elastic strain and the total deformation

Pre-processing:-

Geometry:-

This is given geometry we have to cut the gear to bring the geometry within limit.

After cutting the geometry in spaceclaim we have to update the geometry

Material Selection:-

Structural Steel:-

Connection:-

In the connection we can define various contacts and joints between two worm and gear

Contacts:-

For this case we have only one contact which is frictionless

Frictionless - worm To gear

Joints:-

I have defined two joints for proper boundary conditioning both joints are body to ground

Meshing:-

Mesh size of 3mm is used and is medium.

Element Matrics:-

Analysis Settings:-

The simulation is of 30 steps.

Joint Load:-

The rotation is given in the interval of 100 degree.

Post-Processing:-

Equivalent Stress:-

Equivalent Elastic Strain:-

Total Deormation:-

Results:-

Conclusion:-

In the initial stage I tried to run the simulation with maximum time step value of 5e-2 but after 1200 to 1300 degree of rotation the convergence error occured . To resolve the error I done the modal analysis and calculated the time step value with the help of formula Tmax=1/20(Fmax) .And putted the time step value 5e-3 then afterwords simulation ran as expected without any error.
For this Simulation we can see from result more stress and strain is genrated in gear than the worm .

Ship work like this
in your own course.