Week 8 Worm Gear Challenge
objective: To perform a transient structural analysis on aworm gear assembly and determine the total deformation equivalent stress and equivalent elastic strain developed in the model.
procedure:
create transient structural analysis and in engineering data select the material structural steel
structural steel
import the geometry and check in space claim for any irregularities .
then open ansys mechanical and rename the component as worm gear then assign the structural steel material to all the components.
contact- one contact created as frictionless contact
frictionless- worm to gears
joints
revolute - ground to gear
revolute - ground to worm
mesh - mesh the whole geometry with 2.5mm element size.
Analysis setting - The simulation run for 3D steps so, the number of steps is set as 3D
Large deflection set to on, weak spring set to program controlled, auto time stepping to on, define by time.
initial time step set to 0.2s, Minimum time step set to 0.2s and maximum time step to 0.5s. for seconds to thirty step set carry over time step to on. In output control set all output to yes.
joint rotation - the revolute joint on the worm is provided a rotation of 1500 degrees.
Run the simulation and result obtained
result - the analysis runs successfully and results obtained
total deformation Max- 14.395mm
equivalent strain Max- 1619.8Mpa
equivalent stress Max- 0.008242mm/mm
conclusion:
The maximum stress occurs at point of contact
The maximum deformation are basically measurement of displacement of a worm gear assembly with respect to its intial position.
The maximum stress and strain is observed at teeth root of gear