Week 10 Bullet penetrating a Bucket Challenge

OBJECTIVE:

To simulate a bullet penetrating into a bucket using 3 different non linear materials for the bucket and analyse their behaviour for the same velocity of bullet (139m/s).

Step 1: Engineering Data

• For this analysis we will be using Aluminum 1100 and Tantalum listed inside explicit material library and analyzing the results. Add both materials to the lsit.
• For the Challenge add Copper NL, Stainless Steel NL and Aluminum alloy NL materials for simulation.

Step 2: Geometry

• Right click on geometry and Import the Skill_Lync_bullet_bucket1.igs extension file
• Rename the Static Structural tab as Bullet bucket Explicit model.
• Update the Static Structural tab and proceed to model.

Step 3: Model

• Open Model and under geometry assign names according to convenience for better understanding.
• Assign the names Bucket and Bullet to corresponding geometries.
• Assign tantalum Material to bullet and aluminum to bucket.
• Set the stiffness behaviour of bullet as rigid.

Step 4: Connections

• Contacts:- Delete the default contacts created by software.
• As in explicit analysis we need body interactions, keep the interaction as frictionless.

Step 5: Meshing

• Insert 6mm edge sizing for the 2 edges on the bucket as shown.

Step 5: Setup

• In analysis settings set end time as 0.01.
• set energy error to 5.
• Let the time setting be program controlled.
• Apply a fixed support to the Buckets bottom face.
• Apply velocity to the bullet defined by components and give its values as -139m/s in X-axis direction.

Step 6: Solution

Insert results for Equivalent Strain, Equivalent Stress distribution, Total Deformation for each geometry in focus to observe the values and data.

Simulation Files Attached with video Files

Results amd Simulations for 3 Different materials:

CASES	Units	Copper NL	Stainless Steel NL	Aluminum Alloy NL
Total Deformation	mm	1392	1425.5	1391.7
Equivalent Stress	Mpa	1583.5	2544.8	648.83
Equivalent Strain	mm/mm	0.0195	0.0131	0.0091385