2D Fragment Impact
Training Manual
Workshop 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 Manual
Step 1 – Start AUTODYN standalone
Training Manual
Step 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 Axial
Symmetry
2.e Keep the default set of
units (recommended for
accuracy)
Training Manual
Step 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
Training Manual
Step 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
Training Manual
Step 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 Only
selection (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 Manual
Step 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
6.b Select
New
in the
dialog panel
Training Manual
Step 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 Manual
Step 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
Training Manual
Step 9 – View the Fragment Part
9.a Select
Plots
on the
Navigation Bar
9.b
Material
Location
is the
default plot
9.c Under
Additional
Components
,
check
Vectors
to view the
velocity
vectors
9.d Under
Additional
Components
,
check
Grid
to
view the mesh
Training Manual
Step 10 – Partially fill Fragment with Copper
10.d Enter the
index range
I =
1
-
41
J =
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 Select
Fill
10.c Select
Block
to fill
a block of
elements in
index space
Copper
AL 7036
Training Manual
Step 11 – Fill Fragment core with Tantalum
11.b Enter the
index range
I =
11
-
31
J =
1
-
6
11.c Select
Fill
with Initial
Condition Set
11.d Select
TANTALUM
for the
material
11.e Accept
the data
11.a Select
Block
to fill a
block of
elements in
index space
Copper
AL 7036
Training Manual
Step 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
12.b Select
New
in the
dialog panel
Training Manual
Step 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 Manual
Step 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.c Move to the next step
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)
Training Manual
Step 15 – Review the Setup so far
15.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
Training Manual
Step 16 – Set up Interaction between Fragment and Plate
16.a Select Interaction on the Navigation bar
16.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 Manual
Step 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 Check
again
A message tells you that the interaction has been set up successfully
17.a Select Parts
on the Navigation Bar 17.b Select the plate Part 17.c Select Zoning 17.d Select Translate (under Transformations)
Training Manual
Step 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
Training Manual
Step 19 – Apply the Boundary Condition to Clamp Plate
19.a Select Parts on the Navigation Bar
19.b Select the plate
Part
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 Boundaries
under Additional Components in the
Training Manual
Step 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 Manual
Step 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 Manual
Step 22 – Solve the Problem
22.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
Training Manual
Step 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 Manual
Step 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 Manual
Step 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
Training Manual
Step 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”)
Training Manual
Step 27 – View the GFA Animation
27.a Open the GIF animation (select the file
“fragment_impact_00nn.gfa”)
27.c View the animation
