Week 10 Bullet penetrating a Bucket Challenge
Aim: The objective of this project is to perform an explicit analysis of a bullet penetrating three different non-linear material bucket.
Model Set-up: A cad model of a bucket and a bullet are imported into Ansys workbench. A tantalum material and three non-linear materials structural steel Case 1, copper Case 2 and aluminium Case 3 are added to material library. The bullet is assigned tantalum material with a rigid definition whereas bucket is given three materials for three cases. A default mesh was used as shown in image 1.
Image 1: Mesh details
Load: A velocity was defined to the bullet as shown in image 2.
Image 2: Velocity definition
Fixed Support: The lower end of the bucket is fixed as shown in image 3.
Image 3: Fixed support
Results and Conclusion:
The deformation, stress results and animation for stress for case 1 structural steel bucket are given in image 4,5 and 6:
Image 4: Deformation of case 1.
Image 5: Stress results for case 1
Image 6: Stress animation
The deformation, stress results and animation for stress for case 2 copper bucket are given in image 7,8 and 9:
Image 7: Deformation results for case 2
Image 8: Stress results for case 2
Image 9: Stress animation
The deformation, stress results and animation for stress for case 3 aluminium bucket are given in image 10,11 and 12:
Image 10: Deformation of case 3.
Image 11: Stress results for case 3.
Image 12: Stress animation
| Deformation (mm) | Stress (MPa) | |
| Structural Steel |
Max 1390 Min 1.9816e-27 |
1167.2 9.4123 |
| Copper |
Max 1390 Min 1.9816e-27 |
1566.8 13.533 |
| Aluminium |
Max 1390 Min 1.9816e-27 |
1205.3 7.0158 |
From the above results, we can conclude that the deformation is the same in all the cases but stress varies. Stresses are high when the bullet penetrates the bucket first time and second time. Copper has the highest stresses and aluminium has least.