Performing Transient analysis on Worm Gear using Ansys
OBJECTIVE
To perform a Transient structural analysis on a worm gear assembly and get results for Equivalent stress, Equivalent elastic strain and the total deformation in the model.
Importing the CAD model
The CAD model is imported using spaceclaim and checked for any geometry errors.
Simulation setup
Material Assignment
Both the worm and gear are assigned with structural steel material.
Contact definition
The worm and gear are given a frictionless contact between them. Only few gear teeth are selected for the simulation
Joint creation
Two Body-Ground revolute joints are created for the worm and the gear
Mesh Generation
The entire setup is meshed with default element size.
Analysis settings
The simulation is done in 45 steps.
Few steps settings is shown below.
The worm is given input rotation motion in 45 steps with each step having 50 degree of rotation and thus a total of 2250 degree rotation along Z-axis.
Results
Total Deformation
Equivalent Strain
Equivalent Stress
Contact Status
It can be seen that the tooth has sliding and Near contact status. In some alone sticking takes places.
Contact Pressure
The contact pressure value is maximum at the point where the worm contacts the gear.
| Maximum Total Deformation | Maximum ElasticEquivalent Strain | Maximum Elastic Equivalent Stress | |
| Worm Gear | 21.267 mm | 6.3999e-003 mm/mm | 1157.1 MPa |
The maximum strain and stress occurs at the root of the gear teeth.
Ansys file link
https://drive.google.com/file/d/1OPaYm675rVsfpKGbbeZRMnlF7piFQ6LR/view?usp=sharing