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.