• Author / Uploaded
• sunil_vrv

• Categories
• Mecanica clasica
• Ingeniería mecánica
• Física Aplicada e Interdisciplinaria
• Mecánica
• Física y matemáticas

Citation preview

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