Parametric instability of tapered beam by Finite Element Method
w02 Tapered Beam
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Transcript of w02 Tapered Beam
DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation WS 2-1
WORKSHOP 2
TAPERED BEAM IMPACT
Mar120, Workshop 10, March 2001 WS2-2DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Mar120, Workshop 10, March 2001 WS2-3DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
In this example a tapered beam will impact a rigid wall. This workshop example is designed to make you familiar with the following:
1 - How to define a Surface Contact
2 - How to define a Rigid Plate and constrain it
3 - How to define a velocity for the projectile (Tap ered beam in this case)
4 - How to Define Material Properties for the Steel Beam using DMAT Material model and a Rigid Material for the Rigid Plate.
5 - How to constrain a Rigid Body.
Mar120, Workshop 10, March 2001 WS2-4DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Mar120, Workshop 10, March 2001 WS2-5DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
a
Step 1. Files: Create a New Database
Open new database and name it tapered_beam .
a. Open File Menu and click New.
b. Type tapered_beam under File name and click OK.
c. Select MSC.Dytran for Analysis Code and click OK
c
b
Mar120, Workshop 10, March 2001 WS2-6DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 2. Geometry: Create / Solid / XYZ
Create base of beam.a. Geometry: Create /
Surface / XYZb. Enter <2 2 0> for
Vector Coordination List.
c. Enter [-1 -1 0] for Origin Coordinates List
d. Click Apply .
d
c
b
a
Mar120, Workshop 10, March 2001 WS2-7DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
a. Geometry: Transform / Surface / MScale
b. Enter <0 0 –40> for Translation Vector.
c. Enter 2.0 0.0 0.0 for Column 1 0.0 2.0 0.0 for Column 2 0.0 0.0 2.0 for Column 3 under Rotation Matrix
d. Select Surface 1 for Surface List.
e. Click Apply .
Step 3. Geometry: Transform / Surface / Mscale
a
b
c
d
e
Mar120, Workshop 10, March 2001 WS2-8DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
a. Geometry: Transform / Surface / MScale
b. Enter <0 0 0.25> for Translation Vector
c. Enter 3.0 0.0 0.0 for Column 1, 0.0 3.0 0.0, for Column 2, 0.0 0.0 3.0 for Column 3 under Rotation Matrix.
d. Select Surface 1 .e. Click Apply .
Step 4. Geometry: Transform / Surface / Mscale
a
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Mar120, Workshop 10, March 2001 WS2-9DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
a. Geometry: Create / Solid / Surface.
b. Option: 2 Surfacec. Select Surface 1 for
Starting Surface List.d. Select Surface 2 for
Ending Surface List.e. Click Apply .
Step 5. Geometry: Create / Solid / Surface
a
d
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b
e
Mar120, Workshop 10, March 2001 WS2-10DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
a. Elements: Create / Mesh Seed / Uniform.
b. Enter 2 for Numberc. Select Surface 2.1,
2.2, 2.3, 2.4 for Curve List
d. Click Apply .
Step 6. Elements: Create / Mesh Seed / Uniform
a
d
c
b
Mar120, Workshop 10, March 2001 WS2-11DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 7. Elements: Create / Mesh Seed / Uniform
a. Elements: Create / Mesh Seed / Uniform.
b. Enter 40 for Numberc. Select an edge along
the length of the beam.d. Click Apply .
c
a
c
b
d
Mar120, Workshop 10, March 2001 WS2-12DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 8. Elements: Create / Mesh Seed / Uniform
a. Elements: Create / Mesh Seed / Uniform.
b. Enter 6 for Numberc. Select Surface 3.1,
3.2, 3.3, 3.4 for Curve List.
d. Click Apply .
a
b
c
d
Mar120, Workshop 10, March 2001 WS2-13DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Mesh the beam by using Hex8 elements.
a. Elements: Create / Mesh / Solid.
b. Select Hex for Elem Shape, IsoMesh for Mesher, Hex8 for Topology.
c. Select Solid 1 for Solid List.
d. Click Apply .
Step 9. Elements: Create / Mesh / Solid
d
c
b
a
Mar120, Workshop 10, March 2001 WS2-14DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Create the Mesh for the Rigid Plate by using Quad4 Elements
a. Elements: Create / Mesh / Surface
b. Select Quad for Elem Shape, IsoMesh for Mesher, Quad4 for Topology.
c. Select Surface 3 for Surface List.
d. Click Apply .
Step 10. Elements: Create / Mesh / Surface
a
d
c
b
Mar120, Workshop 10, March 2001 WS2-15DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
a
Create groups for beam, rigid_plate and vel.
a. Group: Createb. Enter beam for New
Group Name.c. Enter Point 1:8 Surface
1 2 Solid 1 Node 1:369 Elm 1:160 for Entity Selection
d. Click Apply .e. Enter rigid_plate for
New Group Name.f. Enter Point 9:12 Surface
3 Node 370:418 Elm 161:196 for Entity Selection
g. Click Apply .h. Enter vel for New Group
Namei. Enter Node 6 366 for
Entity Selectionj. Click Apply then Cancel
Step 11. Group: Create
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Mar120, Workshop 10, March 2001 WS2-16DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Define Material Properties for the beam using DMAT Constitutive Material Model
a. Materials: Create / Isotropic/ Manual Input.
b. Enter steel for Material Name.c. Click Input Properties .d. Constitutive Model: ElasPlas
(DMAT) Element Type: Lagrangian SolidYield Model: Von Mises Failure Model: None, Spallation Model: Spallation Pressure
e. Enter 0.000783 for Density1.64E9 for Coeff. A1 8.18E8 for Shear Modulus1.4E7 for Yield Strength –3.8E7 for Spallation Pressure.
f. Click OKg. Click Apply
Step 12. Materials: Create / Isotropic / Manual Inp ut
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b
a
g
Mar120, Workshop 10, March 2001 WS2-17DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Define Material Properties for the rigid plate using MATRIG definition
a. Materials: Create / Isotropic / Manual Input
b. Enter rigid for Material Namec. Click Input Properties .d. Select Constitutive Model:
Rigid(MATRIG)Valid For: ShellRigid Body Properties: Geometry
e. Enter 50 for Massf. Click OK and then Apply .
Step 13. Materials: Create / Isotropic / Manual Inp ut
c
b
a
f
d
e
Mar120, Workshop 10, March 2001 WS2-18DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Create a Property called beamfor the tapered beam
a. Properties: Create / 3D / Lagrangian Solid
b. Enter steel_beam for Property Set Name
c. Click Input Properties .d. Select steel for Material
Namee. Click OKf. Select Solid 1 for Select
Membersg. Click Add .h. Click Apply .
Step 14. Properties: Create / 3D / Lagrangian Solid
e
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b
a
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f
Mar120, Workshop 10, March 2001 WS2-19DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Create a Property called plate for the rigid plate
a. Properties: Create / 2D / Shell
b. Enter plate for Property Set Name
c. Click Input Properties .
d. Select rigid for Material Name
e. Enter 0.001 for Shell Thickness
f. Click OK.g. Select Surface 3 for
Select Membersh. Click Add .i. Click Apply .
Step 15. Properties: Create / 2D / Shell
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a
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Mar120, Workshop 10, March 2001 WS2-20DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
a
Post group beam and define an impact velocity of 10000 in/sec in positive Z direction for the beam
a. Group: Post
b. Select beamc. Click Apply and then Cancel .d. Loads/BCs: Create / Initial Velocity
/ Nodal
e. Enter initial_velocity for New Set Name.
f. Click Input Data .
g. Enter <0 0 10000> for Trans Veloc
h. Click OK.
i. Click Select Application Region .
j. Click FEM.
k. Select all beam nodes for Select Nodes
l. Click Add .
m. Click OK.
n. Click Apply .
Step 16. Loads/BCs: Create / Initial Velocity / Nod al
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Mar120, Workshop 10, March 2001 WS2-21DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Post group rigid_plate and define a constraint on the rigid plate
a. Group: Post
b. Select rigid_plate .
c. Click Apply then Cancel .d. Loads/BCs: Create / Rigid
Body Object / Nodal
e. Enter rigid_plate for New Set Name
f. Click Input Datag. Select rigid .
h. Activate all Rigid Body Constraints .
i. Click OK.
j. Click Select Application Region .
k. Select FEM.
l. Select a node on the plate.
m. Click OK.
n. Click Apply .
Step 17. Loads/BCs: Create / Rigid Body Object / No dal
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Mar120, Workshop 10, March 2001 WS2-22DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Define a Master/Slave Contactbetween Plate (Master) and the beam (Slave)
a. Loads/BCs: Create / Contact / Element Uniform
b. Choose Master-Slave Surface for Option
c. Enter contact for New Set Name
d. Click Select Application Region .
e. Choose Groups for Form Types
f. Mater / 2D / Bothg. Select rigid_plate from
Available Gradesh. Click Add .i. Slave / 3Dj. Select beam from Available
Grades.k. Click Add .l. Click OK.m. Click Apply .
Step 18. Loads/BCs: Create / Contact / Element Unif orm
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Mar120, Workshop 10, March 2001 WS2-23DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 19. Analysis: Analyze / Input Deck / Translate
Now we are ready for Output Request in Case Control section of the input deck. You may start with defining the Execution Control Parameters
a. Analysis: Analyze / Input Deck / Translate
b. Click Execution Controls .c. Click Execution Control
Parameters .d. Enter 1200 for End Step
1e-7 for Time Step Size at Start1e-9 for Minimum Time Step.
e. Click OK.f. Click OK.
f
c
a
b
e
d
Mar120, Workshop 10, March 2001 WS2-24DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 20. Analysis: Analyze / Input Deck / Translate
Request Effective Stress, Pressure and Effective Plastic Strain for beam
a. Analysis: Analyze / Input Deck / Translate
b. Click Output Requests .c. Enter beam for Result
Name.d. File Type: Archivee. Result Type: Element
Outputf. Select Steps for Outputg. Enter 50 for 0 THRU END
BY (Step) .h. Click Add .i. Select beam for Select
Groups for Output.j. Select Lagrangian for
Entity Typek. Select EFFSTS,
PRESSURE, EFFPLS from Results Types.
l. Click Apply .
a
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Mar120, Workshop 10, March 2001 WS2-25DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 21. Analysis: Analyze / Input Deck / Translate
Create an Archive file for the Rigid Platea. Enter plate for Result
Name.b. File Type: Archivec. Result Type: Element
Outputd. Select Steps for Outpute. Enter 50 for 0 THRU
END BY (Step) .f. Click Add .g. Select rigid_plate for
Select Group for Output.h. Select Dummy for Entity
Type.i. Select user-specified for
Results Typesj. Click Apply .
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b
a
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Mar120, Workshop 10, March 2001 WS2-26DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 22. Analysis: Analyze / Input Deck / Translate
Request a Velocity and Force Time History Plots of the nodes located at the tip and end of the beam.
a. Enter vel for Result Nameb. File Type: Time Historyc. Result Type: Grid Point
Output.d. Select Steps for Outpute. Enter 2 for 0 THRU END
BY (Step) .f. Click Add .g. Select vel from Select
Groups for Output.h. Select ZPOS, ZVEL,
ZFORCE for Result Types.
i. Click Apply .j. Click OK
i
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ga
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b
c
d
Mar120, Workshop 10, March 2001 WS2-27DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 23. Analysis: Analyze / Input Deck / Translate
Now you are ready to write the input deck
a. Analysis: Analyze / Input Deck / Translate
b. Click Apply .
b
a
Mar120, Workshop 10, March 2001 WS2-28DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 24. Simulation on UNIX-platforms
Simulation on UNIX-platforms
The Dytran input deck will be named tapered_beam.dat which will be in your directory.
To run the job on Unix Platform, type in the following command in your working directory:
dytran jid=tapered_beam
Mar120, Workshop 10, March 2001 WS2-29DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 25. MSC.Dytran Analysis
Run MSC.Dytran Analysisa. Select tapered_beam.dat
for Dytran Analysisb. Click the play icon
a
b
Mar120, Workshop 10, March 2001 WS2-30DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 26. Analysis: Read Archive File / Results / Tr anslate
Read in the results by translating the ARC-file where the analysis results are storeda. Analysis: Read Archive File / Results
/ Translate.b. Click Select Archive File .c. Select and Add both
TAPERED_BEAM_BEAM_0.ARC and TAPERED_BEAM_PLATE_0.ARC
d. Click Add.e. Click Apply.f. Click Apply .
e
d
c
b
a
f
Mar120, Workshop 10, March 2001 WS2-31DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 27. Results: Create / Quick Plot
Let’s have a Quick Plot of the Deformed Shape of the last cycle.
a. Results: Create / Quick Plot
b. Select Cycle 1200c. Select EFFSTS for
Select Fringe Results
d. Select Displacement for Select Deformation Result.
e. Click on Deform Attributes .
f. Select True Scalefor Scale Interpretation.
g. Deactivate Show Undeformed .
h. Click Apply .
e
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c
b
a
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f
h
Mar120, Workshop 10, March 2001 WS2-32DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 28. Results: Create / Deformation
a. Results: Create / Deformationb. Select all from Select Result
Case(s).c. Select Displacement from
Select Deformation Resultd. Click Animate .e. Click Display Attributes .f. Select True Scale for Scale
Interpretation.g. Deactivate Show
Undeformed .h. Click on Animation Options .i. Select 3D for Animation
Graphicsj. Enter 25 for Number of
Frames.k. Click Apply .
h
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b
a
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Mar120, Workshop 10, March 2001 WS2-33DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 29. Results: Create / Fringe
a. Results: Create / Fringeb. Select EFFSTS from
Select Fringe Resultc. Enable Animate .d. Click Apply .
d
c
b
a
Mar120, Workshop 10, March 2001 WS2-34DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 30. Analysis: Read History File / Results / Tr anslate
a. Analysis: Read History File / Results / Translate
b. Click Select History File .c. Select
TAMERED_BEAM2_VEL_0.THS .d. Click Add .e. Click Apply .f. Click Apply .
b
a
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d
c
e
Mar120, Workshop 10, March 2001 WS2-35DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 31. Analysis: Time History
a. Analysis: Time Historyb. Click Apply .c. Uncheck Normalize .d. Click Windows .e. Enter nodes for Current
Window.f. Click Create .g. Click Cancel
d c
f
e
g
b
a
Mar120, Workshop 10, March 2001 WS2-36DYT101, Workshop 2, January 2005Copyright 2005 MSC.Software Corporation
Step 32. Analysis: Time History
a. Select th_ZVEL_gp_6.curve2 and th_ZVEL_gp_366.curve5 from the Existing Curves box.
b. Click Post .
b
a