Week 10 Bullet penetrating a Bucket Challenge

Bullet penetrating a Bucket Simulation

Objective:

Simulate a bullet penetrating into a bucket by using 3 different nonlinear materials for the bucket and analyse their behaviour for the same velocity of bullet and attach an animation to show the behaviour in the three cases.

1. Analysis System: Explicit Dynamics
2. Material Properties:

Bucket Material: Aluminium Alloy NL / Copper Alloy NL / Structural Steel NL

Aluminium Alloy NL

Copper Alloy NL

Structural Steel NL

Bullet: Tantalum

Tantalum

3. Mesh:

6 mm of edge meshing is given on bucket

Mesh Element Quality:

4. Analysis Setting

No of Steps: 1

Load Step Type: Explicit Time Integration

End Time: 0.01

Maximum Energy Error: 5

5. Boundary Conditions:

• Fixed support is defined at base of bucket.

• Velocity of 139 m/s is given on bullet.

Result Plot:

Case_1 - Aluminium Alloy NL

Equivalent stress (Mpa)
Total Deformation
Equivalent plastic strain
Simulation Animation

Case_2 - Copper Alloy NL

Equivalent stress (Mpa)
Total Deformation
Equivalent plastic strain
Simulation Animation

Case_3 - Structural Steel NL

Equivalent stress (Mpa)
Total Deformation
Equivalent plastic strain
Simulation Animation

Conclusion:

Sr. No	Result Plot	Case_1	Case_2	Case_3
1	Equivalent stress (Mpa)	423.22	1186.3	4427.5
2	Total Deformation	1395.9	1398	1418.9
4	Equivalent plastic strain	1.4362	1.484	1.4898

1. Equivalent Stress is higher in case where bucket material is Structural Steel NL around 4427.5 Mpa.
2. Total deformation is almost same in all three cases.
3. Equivalent plastic strain is higher in case 3 around 1.4898.