Week 10 Bullet penetrating a Bucket Challenge

Objective:

To simulate a bullet penetrating into a bucket, need to use 3 different non linear materials for the bucket and analyse their behaviour for the same velocity of bullet.

Procedure:

* Open ANSYS Work bench, from the analysis systems drop the Explicit Dynamics in Project schematic.

* Select required material from materials tab, In our case we need Tantulam (for bullet), any three NL materials for bucket.

* Import Geometry and open in design modular to check the geometry. Open in Mechanical module and rename the parts (if required) for easy identification purpose.

* Delete the default contacts which are not required for explicit dynamics.

* In the Mesh, Insert 6mm sizing for the both edges of bucket to get more accurate results at bullet penetration area.

* Analysis settings needs 1.e-002s end time and set the energy error as 5.

* Insert velocity and apply it to bullet with velocity of -139000mm/s in x-direction.

* Insert fixed support and apply it to bucket bottom face.

* Insert output results required to analysis. Total deformation and Equivalent stress are required. and click on the solution to start simulation.

Results: case-1 Aluminium alloy NL

Total deformation: 1399.5mm

Equivalent stress: 1046.8 MPa

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Case2: Stainless steel NL

Total deformation: 1714.9mm

Equivalent stress: 4038.1 MPa

case3: Cooper alloy NL

Total deformation: 1129.2mm

Equivalent stress: 2602.2MPa

Energy Conservation Graph:

Conclusion:

In total deformation point of view Stainless steel NL > Aluminium alloy NL > Cooper alloy NL

In Equivalent stress point of view Stainless steel NL > Cooper alloy NL >Aluminium alloy NL