Week 1 Spur Gear Challenge

STRESS ANALYSIS OF SPUR GEAR USING THREE DIFFERENT MATERIALS

OBJECTIVE :

In this analysis , we are opted to spanalyze for the stress concentration acting up on the spur gear and their behavior ( deformation) upon loads at different time basis ,. and finally recommend efficient material .

PROCEDURE :

• At first we need to assign the materials specification if not available in the engineering data
• After assigning the material properties , we need to then import the model of the spur gear provided .
• Once after importing the model , update the model by assigning the material , and contacts to be selected for the 13 tooth required for simulation .
• After assigning the contacts ,we need to then assign the joint to the gears , the joint we used for the simulation of spur gear is revolute joint

• After updating the model , we need to create the mesh for the analysis , here we used 1 mm mesh , and the type of mesh is tetrahedrons
• Once after updating the mesh , we need to specify the solver operation , the solver should operate in a time basis , so we specified 6 no of steps to carry on for alloted time steps .
• After the time steps settings we need to then assign the load , here we used revolute joint , here we chosen right gear as target body and the left gear as the contact body . We assigned rotation on the time step basis , as 30 degree for 6 no of sequence to the left gear and the moment for the right gear of 10 N-m anticlockwise direction
• Once after providing the necessary solver data , we need to then solve the model for the given constraints and post-process for total- deformation and maximum stress

CONTACTS:

JOINTS:

• Select the type as body to ground
• And give the drive gears rotation and the driven gears momentum

MESH :

A default of 1 mm mesh is used here for all the three materials

BOUNDARY CONDITIONS :

The gear is to be rotated for 180 degrees in 6 steps

No . Of steps : 6

Angle : 180 degree

MATERIAL 1 : cast iron ( ductile )

MATERIAL 2 : cast steel

MATERIAL 3 : cast copper ( bronze )

MATERIAL 3 :

MATERIAL 1 :

MATERIAL 2 :

DEFORMATION AND STRESS ANIMATION:

CAST IRON

CAST STEEL

RESULT :

From the above analysis we come to conclude that , each material has their own property , among them cast iron and cast steels are generally used for large transmissions , where as cast copper is used in small scale transmission , for example : cast copper is used in watches , whereas the cast iron and cast steels are used in the transmission of automobiles sometimes and also in several other machinary . So , I will recommend cast iron , which is widely used and also easily available from sctrach too and can also be used to transmit more power , withstand stress and has some life than other two materials.