Week 2 Railwheel and Track

OBJECTIVE:

• Set up the model for structural analysis and compae the results with different case
• Create a uder defines solution and compare it between both the cases

STEPS Carried Out:

Create contact:-

• Import the geometry and open it in mechanical module to set up the model
• First rename the contact based on definition for easy understanding
• Flip the contact and target, establish connection between shaft and wheel, Wheel and track
• Connection between shaft and wheel should be fricionless contact
• Connection between Wheel and track should be frictional type with 0.3 co-fficient

Create Joint:-

• Create fixed joint for the track, this joint is for making the track fixed
  Connection type=Body to ground
  Type=Fixed
  
• Create translation joint on shaft, make sure the translation is in proper direction
  Connection type=body to ground
  Type=Translation
  
• Create planar joint
  Connection type=body to ground
  Type=Planar
  
  
  

Mesh

• Mesh the components with 50mm element size
• Use face sizing in the contacting faces with 35mm element size

Analysis settings

• Analysis setting for 1 st step is shown in below image
  
  
  
• Analysis setting for 2nd to 5th step
  

Create joint load:-

• Define joint load for the translation joint created before
  
• Apply bearing load of 100KN in negative y direction on the wheel
• Reapeat the same step for next case , only change will be bearing will be 500KN
• Sizing and global mesh size should be 35mm

Output Request:

Case1(100KN):-

• Total deformation
  
• Von mises stress
  
  
• Von mises Strain
  
  
• Von mises stress for wheel
  
  
• Von mises strain for wheel
  
  
• User defined solution
  

Case2(500KN):-

• Total deformation
  
• Von mises stress
  
• Von mises Strain
  
• Von mises stress for wheel
  
• Von mises strain for wheel
  
• User defined solution
  

RESULTS:

• Case 1(100 KN) results
  
  
  
• Case 2(500KN) results
  
• Create user defined solution for both the cases, for displacement and compare it with total deformation
• the expression for user defined solution is ux+uy+uz
• Case1 100KN
  User defined=209.75mm; Total deformation=10001.1mm
• Case2 500KN
  User defined=209.32mm; Total deformation=10001.2mm

CONCLUSION:

• From the above results we can see the deformation is same in both the case
• Von mises stress is more in the case 2 , due to finer mesh
• Von mises stress on wheel is also more in case 2
• We can see the default deformation is more than the user defined