(ANSYS_P11)Worm Gear Challenge

OBJECTIVE:Perform a Transient structural analysis on a worm gear assembly in ANSYS Workbench.

The model above is halfed with spaceclaim in order to reduce the computational power to solve the problem.

TASK

Perform a transient structural analysis on a worm gear assembly.  For the challenge, I 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. 

CONNECTIONS

• A frictionless contact is defined with worm as the contact and gear as the target.

JOINTS

• Revolute Joint

A revolute joint is specified on the gear with respect to the ground.

• Revolute Joint

A revolute joint is specified on the worm with respect to the ground.

MESHING

The default mesh with adaptive sizing is used

ANALYSIS SETTING

50 STEPS ARE USED

For step 1,

• Auto Time Stepping: On
• Defined by : Time
• Initial time : 0.2
• Minimum time : 0.2
• Maximum time : 0.5
• Solver Type : PROGRAM CONTROLLED
• Weak Spring :Controlled 
• Large deflection: ON

For step 2-50,

• Auto Time Stepping: On
• Defined by : Time
• Carry over time stepn :ON
• Initial time : 0.2
• Minimum time : 0.2
• Maximum time : 0.5
• Solver Type : PROGRAM CONTROLLED
• Weak Spring :Controlled 
• Large deflection: ON
• Output controls : Set all to YES

JOINT LOAD

• Joint load is assigned to the worm.
• Selecting a rotation , tabular data is inputed from 50 to 2500. Interval of 50

OUTPUT REQUEST

• DIRECTIONAL DEFORMATION
• EQUIVALENT STRAIN
• EQUIVALENT STRESS

DIRECTIONAL DEFORMATION (50 mm)

EQUIVALENT STRAIN (7.1e-03 mm)

EQUIVALENT STRESS (1338.8 Mpa)

CONCLUSION

The transient simulation was a success. The equivalent stress developed was maximum on the gear around the teeth area. The gears developed stresses higher than the ultimate yield strength of structural steel.

Due to the fact that the file to be uploaded is larger than 200mb, I have attached a google link below.

https://drive.google.com/drive/folders/1HB14tPOtHT9REK1Gkah0WNRidzJIMKQG?usp=sharing