ansys autodyn 120 workshop 01

WS 1-1ANSYS, Inc. Proprietary© 2009 ANSYS, Inc. All rights reserved.

February 27, 2009Inventory #002665

Workshop 1

2D Fragment Impact

ANSYS AUTODYN

Workshop 1. 2D Fragment Impact



Training ManualWorkshop Goal and Procedure

Goal:

Model a multi-material cylindrical fragment impacting a plate

Procedure:

Start AUTODYN standalone

Set up the problem in using 2D Axial Symmetry

Solve the problem

View the results

Create animations of the results




Training ManualStep 1 – Start AUTODYN standalone

1. Start AUTODYN standalone (Double click autodyn.exe)




Training ManualStep 2 - Initiate a new project

2.a Start a new project

2.b Browse to select a project Folder

2.c Enter an Ident“fragment_impact” and a Heading

2.d Select 2D AxialSymmetry

2.e Keep the default set of units (recommended for accuracy)

2.f Accept the data




Training ManualStep 3 – Retrieve material data from library

3.a Load material data

3.b Select the following materials from the library:

AL 7036

COPPER (Shock, Piecewise JC)

Steel 1006

Tantalum (Shock, von Mises)

3.c Accept the data<Control>+<Click>




Training ManualStep 4 – Specify an erosion model for each material

4.a Select a material

4.b Modify the material data

4.c Select Geometric Strain for the erosion model

4.d Enter “2.0”(200%) for the erosion strain

4.e Select Instantaneous for the Type of Geometric Strain

4.f Accept the data

Repeat 4.a – 4.f for each material




Training ManualStep 5 – Create an Initial Condition Set for the fragment

5.a Select Init. Cond. On Navigation Bar

5.b Select New in the dialog panel

5.c Enter “frag_vel” for the Initial Condition Set Name

5.d Keep the default Velocity Onlyselection (you will apply it to different materials)

5.e Enter “2000.0” for the X-velocity (The X-axis is always the symmetry axis)

5.f Accept the data




Training ManualStep 6 – Generate a Part for the Fragment

6.c Enter “fragment” for the Part Name

6.d Keep the default Lagrange Solver

6.e Keep Part wizard

6.f Move to the next step

6.a Select Parts On Navigation Bar





Training ManualStep 7 – Define Geometry for the Fragment

7.a Select the Box Predef(default)

7.b Enter (-40.0, 0.0) for the box origin and (40.0,10.0) for the box dimensions

7.c Move to the next step




Training ManualStep 8 – Mesh and Fill the Fragment (with AL)

8.a Enter “40” and “10” for the number of cells (elements) in the I(X) and J(Y) direction

8.b Move to the next step

8.c Check Fill with Initial Condition Set (frag_vel is the only one defined)

8.d Select AL 7039 for the material (you fill the entire fragment with Aluminum now, then refill later with additional the materials)

8.e Accept the data

SC




Training ManualStep 9 – View the Fragment Part

9.a Select Plotson the Navigation Bar

9.b Material Location is the default plot

9.c Under Additional Components, check Vectorsto view the velocity vectors

9.d Under Additional Components, check Grid to view the mesh

Rotate, Translate, Zoom




Training ManualStep 10 – Partially fill Fragment with Copper

10.d Enter the index range I = 1-41J = 9-11

10.e Select Fill with Initial Condition Set

10.f Select COPPER for the material

10.g Accept the data

10.a Select Parts on the Navigation Bar

10.b SelectFill

10.c Select Block to fill a block of elements in index space

Copper

AL 7036




Training ManualStep 11 – Fill Fragment core with Tantalum

11.b Enter the index range I = 11-31J = 1-6

11.c Select Fill with Initial Condition Set

11.d Select TANTALUMfor the material

11.e Accept the data

11.a Select Block to fill a block of elements in index space

Copper

AL 7036

Tantalum




Training ManualStep 12 – Generate a Part for the Plate

12.c Enter “plate”for the Part Name

12.d Keep the default Lagrange Solver

12.e Keep Part wizard

12.f Move to the next step

12.a Select Parts On Navigation Bar





Training ManualStep 13 – Define Geometry for the Fragment

13.a Select the Box Predef(default)

13.b Enter (0.0, 0.0) for the box origin and (30.0,120.0) for the box dimensions





Training ManualStep 14 – Mesh and Fill the Plate

14.a Enter “30” and “60” for the number of cells (elements) in the I(X) and J(Y) direction

14.b Check Grade zoning in J-direction and enter “1.0” for the fixed size, Times “10”, and select Lower J


14.d DO NOT Check Fill with Initial Condition Set (only the fragment has an initial velocity)

14.e Select STEEL 1006 for the material (you fill the entire fragment with Aluminum now, then refill later with additional the materials)

14.f Accept the data




Training ManualStep 15 – Review the Setup so far15.a Visually check that

materials have been assigned correctly to the fragment

15.b Visually check that all nodes of the fragment have been assigned the initial velocity

15.c Visually check that the mesh for the plate has been graded correctly

The 1st 10 radial elements should match the element size of the fragment exactly

The remaining elements should increase smoothly in size out to the radius of the plate




Training ManualStep 16 – Set up Interaction between Fragment and Plate

16.a Select Interaction on the Navigation bar16.b External Gap is the only option available for

structured (I,J) Parts

16.c Calculate the Gap size (AUTODYN calculates the recommended Gap size and displays it)

16.d Check the Gap size is valid and that all Parts are initially separated by the Gap size (say yes to all the prompts)

An error message tells you that the Fragment and Plate are not separated by the Gap size (they are touching)




Training ManualStep 17 – Separate the Fragment and Plate by the Gap size

17.e Enter “0.1” for the X translation

17.f Accept the input(Plate is translated

away from the Fragment by the Gap size)

17.g Return to the Interactions menu and run the Checkagain

A message tells you that the interaction has been set up successfully

17.a Select Partson the Navigation Bar

17.b Select the plate Part

17.c Select Zoning

17.d Select Translate (under Transformations)




Training ManualStep 18 – Define a Boundary Condition to Clamp the Plate

18.a Select Boundaries on the Navigation Bar

18.b Select New to define a new boundary condition

18.c Enter the Boundary Name “Clamp”

18.d Select Velocity for the Type and General 2D Velocity for the Sub option

18.e Enter “0.0” for the X and Y velocity components

18.f Accept the data




Training ManualStep 19 – Apply the Boundary Condition to Clamp Plate19.a Select Parts on the

Navigation Bar

19.b Select the platePart

19.c Select Boundary

19.d Select J Line

19.e Enter I = 1-31 for the I-range and J = 61(the top boundary)

19.f Select the “Clamp”Boundary

19.g Accept the data

19.h Make sure the boundary condition has been applied correctly by checking Boundariesunder Additional Components in the Plots dialog panel




Training ManualStep 20 – Set Solution and Output Controls

20.a Select Controls on the Navigation Bar

20.b Enter a large number for the cycle limit and “0.07” for the Time Limit

20.c Select Output on the Navigation Bar

20.d Request Save files to be written every “0.002” ms




Training ManualStep 21 – Load a Plot Settings File (3D View)

21.a Load the plot settings file “fragment_impact.set”

21.b Notice that the loaded plot settings provide a 3D view where the model is rotated through 270 deg.

21.c Extra credits: Try creating this view yourself without loading the settings file




Training ManualStep 22 – Solve the Problem22.a Save your

Data

22.b Solve the problem

During the solve, the view is automatically updated to show the most current solution

A summary of the current computation cycle (Cycle #, Time, Timestep) is shown below the view panel,

Press Stop at any time to interrupt the Solve




Training ManualStep 23 – View Results from the Save Files

23.a When calculation terminates message gives reason for termination

23.b Pull-down menu allows quick access to all the Save files

Try loading and viewing different Save files




Training ManualStep 24 – Create a GIF Slide Show of Results

24.a Select Plots on the Navigation Bar

24.b Select Generate multiple slides

24.c Select all the available cycles (i.e. Save files)

24.d Select Start and a GIF animation will be generated (move the window away from the view before doing this if you want to see each slide of the animation being generated clearly)

24.e Close the window when the animation is complete




Training ManualStep 25 – Create a GFA Slide Show of Results

25.a Select Setup Slideshow

25.b Change the Image type from gif (default) to gfa

25.c Accept the data

25.d Perform Step 24 again to produce the GFA animation

(message is given when GFA animation is complete)




Training ManualStep 26 – View the GIF Animation

26.a Select View Slides on the Navigation Bar to start the ANSYS Viewer

26.b Open the GIF animation (select the file “fragment_impact.gif”)

26.c View the animation




Training ManualStep 27 – View the GFA Animation

27.a Open the GIF animation (select the file “fragment_impact_00nn.gfa”)

27.c View the animation

27.c Change the animation view

ansys autodyn 120 workshop 01

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