Week 10 Bullet penetrating a Bucket Challenge

AIM

To Simulate a bullet penetrating into a bucket using three different non-linear materials.

OBJECTIVE

The main objective of this project is to simulate the bullet penetrating into a bucket using three different non-linear materials.

1. Structural steel Non- Linear.
2. Magnesium alloy Non- Linear.
3. Aluminum alloy Non- Linear.

MATERIAL PROPERTIES

Structural Steel Non-Linear

Magnesium Alloy Non - Linear

Aluminum Alloy Non - Linear

PROCEDURE

Geometry

• Importing the geometry in the space claim module for checking any abnormalities and surfaces damaged, but the geometry seems ok to run for simulation.

• After opening the bullet generating bucket geometry in the mechanical module rename all the parts and then giving each part with their material properties for bucket the structural steel for case 1 and for the bullet to be Tantalum with the stiffness behavior as the Rigid.

• The contacts are detected by Ansys but those contact for Explicit dynamic simulation and for this geometry is not needed so it is deleted.

Mesh

• For the bucket, the body sizing is given with the mesh size 10mm and for overall geometry, the mesh is given as the default, where the nodes are obtained after generating mesh around 6321 and the elements around 15801 which is below the student academic limit for simulation process.

Analysis Settings

• Giving the end time step as 1 e+07 and the maximum energy error as the 5 with increase the limit compared to previous simulations done also the initial, maximum, and the minimum time step to be the program-controlled.

• Giving the fixed support to the bottom face bucket geometry, so it should not move freely once the bullet penetrates at a given velocity.

• The bullet is given with a specific velocity to penetrate the bucket, the value of the velocity is -1.39 e+5 in the x-direction and others are to be set as 0(constant).

RESULTS

Case 1: Structural Steel Non-Linear.

Total Deformation

Equivalent von mises stress

Case 2: Magnesium Alloy Non-Linear

Total deformation

Equivalent von mises stress

Case 3: Aluminium Alloy Non-Linear

Total deformation

Equivalent von mises stress

CONCLUSION

Structural Steel

Magnesium Alloy

Aluminum Alloy

• The simulation runs successfully for the velocity to the bullet -1.39e+05 the maximum and minimum stress is to be seen in the structure steel compare to the Mangensium alloy and the aluminum alloy, also for the total deformation the value seems to be the same for all three non-linear materials.
• Total deformation in case1, case2, and case3 is the same as the distance that is traversed by the Bulletin 0.001s
• The highest stress is observed in the case of Structural steel NL indicating copper Alloy NL offered the Maximum resistance to the incoming bullet than the other two materials