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Example 1 LS Dyna - Bullet model Simulation
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Example 1 LS Dyna - Bullet model Simulation
This is a example to simulate BULLET MODELING through FEA in LS dyna...
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sunil_vrv
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Example 1: Bullet impact
1
Ex. 1: Bullet impact Q
New model Q Q
Ident Bullet Symmetry 3D, Z
Q
Load Materials – CART BRASS, FLOATGLASB, LEAD (Shock, Steinberg Guinan) Add erosion to all materials (geometric strain = 1.0)
Q
Import parts from dyna: BulletInner.K and BulletOuter.K
Q
Q Q Q
Delete components Create new component containing both parts Transform component Q Q Q
Rotate 180 degrees about Y-axis Rotate 150 degrees about Z-axis Translate –0.36mm in X direction
2
Ex. 1: Bullet impact Q
Define Initial Conditions Q Q Q Q Q Q
Q
Define Boundary Conditions Q Q Q
Q
Name: Fixed Type: General 3D Velocity Set all parameters to 0.0
Fill parts with initial conditions Q Q
Q
Name: Inner Material: Lead Velocity: X=519.6m/s, Y=-300m/s Name: Outer Material: CART BRASS Velocity: X=519.6m/s, Y=-300m/s
Fill Core with Inner Fill Casing with Outer
Delete unused materials
3
Ex. 1: Bullet impact Q
Create Part Q Q Q Q Q Q Q Q
Name: Target Solver: Lagrange Select: Parts Wizard Predef: Box Origin: (0.0,-50.0,0.0) Size: 2.5x100.0x50.0 Numerical size: 5x50x25 Grade Zoning Q Q
Q
Q
In J direction, 0.5mm,20 cells, centred In K direction, 0.5mm,10 cells, lower K
Fill with FLOATGLASB
Convert part to IJK (from import pull down menu)
4
Ex. 1: Bullet impact Q
Define Group Q Q
Q
Add nodes to group Q
Q
Q
Name: Fix Type: Nodes
Use Alt+left mouse button to draw polygon as shown Use Control+left mouse button to close polygon
Apply boundary condition “Fixed” to group
5
Ex. 1: Bullet impact Q
Join two parts of bullet together.
Q
Define Interactions Q
Calculate gap size and check.
Q
Define Wrap-up Criteria
Q
Define Save times
Q
Save and execute
6
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