Week 10 Bullet penetrating a Bucket Challenge

OBJECTIVE:-

• To set up the Model for Bullet penetrating Bucket challenge with different materials and observing the change in the results

Steps:-

Import Materials:-

• In this challenge we will be using explicit dynamics analysis system
• As mentioned above let us import any three nonlinear materials from engineer data
• I am using Copper alloy NL, Aluminium Alloy NL and Magnesium Alloy NL ,these materials for bucket in each case
• Tantalum material from explicit material is used for Bullet

Mechanical Module:-

• Open the model in space claim and check for abnormalities in model
• Open it in mechanical module, rename the geometry for convinience
• Assign the materials to the geometry
• Stiffness behaviour of bullet should be rigid
  
• Delete the default contacts created between the models

Mesh:-

• Perform edge sizing on the both edges where bullet enters ans exits
• Let the element size be 6mm
  

Analysis system:-

• Set the end time for 0.01 sec
• Set the energy error to 5
• Let all the other setting be default

Define Load:-

• Define fixed support for the botton face of bucket
  
• Define velocity of 139000 mm/s in global negative X direction
  

Results and Conclusion:

Case 1(Bucket material = Aluminium Alloy NL):-

• Total deformation
  
• Equivalen stress
  

Case 2(Bucket material = Copper Alloy NL):-

• Total deformation
  
• Equivalen stress
  

Case 3(Bucket material = Magnesium Alloy NL):-

• Total deformation
  
• Equivalen stress
  

• Non-linear Material	Total Deformation(mm)	Eq Stress(Mpa)
  Aluminium alloy	1391	632.28
  Copper Alloy	1399.7	1196.6
  Magnesium Alloy	1391.2	557.63

• From the above tabular data we can see the equivalent stress is more in Copper alloy
• The derformation is more in copper alloy
• From the above three materials density of Copper>Aluminium>Magnesium
• So this concludes the material with higher density will experience higher stress