workshop 8b tension coupon - unizg.hr
TRANSCRIPT
WORKSHOP 8B
TENSION COUPON
WS8B-2NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
WS8B-3NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Workshop ObjectivesPractice creating and editing geometry
Practice mesh seeding and iso meshing techniques.
WS8B-4NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Suggested Exercise Steps1. Create a new database. 2. Create a geometry model of the tension coupon. 3. Use Mesh Seeds to define the mesh density.4. Create a finite element mesh.5. Verify the finite element mesh. 6. Define material properties. 7. Define element properties and apply them to the model. 8. Apply boundary conditions to the model.9. Apply loads to the model.10. Submit the model to MSC.Nastran for analysis.11. Post Process results using MSC.Patran.
WS8B-5NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
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Step 1. Create New Database
Create a new database called tension_coupon_b.db
a. File / New.b. Enter
tension_coupon_b as the file name.
c. Click OK.d. Choose Default
Tolerance.e. Select MSC.Nastran as
the Analysis Code.f. Select Structural as the
Analysis Type. g. Click OK.
a
WS8B-6NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 2. Create Geometry
Create the first curvea. Geometry: Create / Curve
/ XYZ.b. Enter <0 4 0> for the
Vector Coordinate List.c. Enter [0 0 0] for the Origin
Coordinate List.d. Click Apply.
a
b
c
d
WS8B-7NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Create the second curve by translating the first curve
a. Geometry: Transform / Curve / Translate.
b. Enter <10 0 0> for the Direction Vector.
c. Click in the Curve List box and screen pick the first curve.
a
b
c
Step 2. Create Geometry
WS8B-8NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Create two more curvesa. Geometry: Create / Curve /
Point.b. Screen pick the point at the
bottom of the left curve.c. Screen pick the point at the
bottom of the right curve. A curve is automatically created because Auto Execute is checked.
d. Screen pick the top of the left curve.
e. Finish creating the top curve by screen picking the point at the top of the right curve as shown.
a
b c
ed
Step 2. Create Geometry
WS8B-9NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Create a chain curvea. Geometry: Create / Curve /
Chain.b. Rectangular pick all four
curves.c. Click Apply.d. When the message box
appears, choose Yes to delete the original curves.
a
b
c
d
Step 2. Create Geometry
WS8B-10NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Create a circlea. Geometry: Create / Curve /
2D Circle.b. For the circle radius, enter
1.0.c. For the Center Point List
enter [5 2 0].d. Click Apply.
a
c
b
d
Step 2. Create Geometry
WS8B-11NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Create a trimmed surfacea. Geometry: Create / Surface
/ Trimmed / Option: Planar.b. Click in the Outer Loop List
box.c. Screen pick the outer
curve.d. Click in the Inner Loop List
box.e. Screen pick the inner circle.f. Click Apply.g. When the message boxes
appear, choose Yes to delete the original curves.
h. Click the Refresh Graphics icon
a
b
d
c
f
g
h
e
Step 2. Create Geometry
WS8B-12NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Create two more curvesa. Geometry: Create / Curve /
XYZ.b. Enter <0 4 0> for the
Vector Coordinate List.c. Enter [3 0 0] for the Origin
Coordinate List.d. Click Apply.e. Repeat this procedure with
[7 0 0] as the Origin Coordinate List.
a
b
d
c
Step 2. Create Geometry
WS8B-13NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Break the surface into 3 surfacesa. Geometry: Edit / Surface /
Break.b. Set the Option to Curve.c. Screen pick the trimmed
surface. d. Screen pick the left curve
as shown.e. When the message box
appears, choose Yes to delete the original surfaces.
f. Screen pick the new trimmed surface, and pick the right curve to break it.
a
b
cd
e
f
Step 2. Create Geometry
WS8B-14NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Create additional pointsa. Turn Point size on.b. Geometry: Create / Point /
Interpolate.c. Set the Option to Curve.d. Screen pick the top of the
surface above the circle as shown.
e. Repeat the procedure by screen picking each of the other three edges surrounding the circle.
a
d
Step 2. Create Geometry
b
c
WS8B-15NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Create four curvesa. Geometry: Create / Curve /
Point.b. Screen pick the point
above the center of the circle as shown.
c. Screen pick the point below the center of the circle to create a curve.
d. Repeat the procedure by screen picking opposite points surrounding the circle to create four curves as shown.
a
b
c
Step 2. Create Geometry
WS8B-16NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Break the magenta surfacea. Geometry: Edit / Surface /
Break.b. Screen pick the magenta
surface.c. Screen pick the vertical
curve. d. When the message box
appears, choose Yes to delete the original surfaces.
e. Repeat the procedure to break two surfaces with the horizontal curve.
f. Repeat the procedure to break two surfaces with a diagonal curve.
g. Repeat the procedure to break two surfaces with the other diagonal curve.
a
bc
e
f
g
The original magenta surface has been broken into 8 green surfaces.
d
Step 2. Create Geometry
WS8B-17NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Break the rectangular surfacesa. Geometry: Edit / Surface /
Break.b. Set the option to Point.c. Screen pick the left
rectangular surface as shown.
d. Screen pick the point on the edge of the rectangular surface as shown.
e. When the message box appears, choose Yes to delete the original surfaces.
f. Repeat the procedure by screen picking the other rectangular surface and the point on the edge of the surface.
e
a
bc
d f
Step 2. Create Geometry
WS8B-18NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Delete excess curvesa. Turn Point size offb. Geometry: Delete / Curve. c. Rectangular pick all of the
curves as shown.d. Click Apply.e. Click Refresh graphics.
b
a
c
d
e
Step 2. Create Geometry
WS8B-19NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 3. Create Mesh Seeds
Create a uniform mesh seeda. Elements: Create / Mesh
Seed / Uniform.b. Enter 3 for the Number of
Elements.c. Click in the Curve List box.d. Screen pick each of the
four edges on the left and right sides of the circle as shown.
a
b
c
d
WS8B-20NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 3. Create Mesh Seeds
a
bc
d
Create a biased mesh seeda. Elements: Create / Mesh
Seed / One Way Bias.b. Enter 6 for the Number of
Elements.c. Enter 4 for L2/L1.
Depending on the direction of the arrow, you may have to enter 0.25 (or-4) to get the correct biasing.
d. Click on the Curve List box. e. Screen pick the four
remaining edges on the circle.
f. Screen pick the horizontal edge to the right of the circle.
e f
WS8B-21NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
The mesh seeds should agree with the picture on the right.
Step 3. Create Mesh Seeds
WS8B-22NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 4. Create Mesh
Create a finite element mesha. Elements: Create / Mesh /
Surface.b. Set the Element Shape to
Quad, Mesher to IsoMesh, and Topology to Quad4.
c. Click in the Surface List box.
d. Rectangular pick the surfaces as shown.
e. Enter 0.5 as the value for Global Edge Length.
f. Click Apply.
a
b
c
f
e
d
WS8B-23NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 4. Create Mesh
Equivalence the modela. Elements: Equivalence /
All / Tolerance Cube. b. Click Apply.
a
b
WS8B-24NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 5. Verify Mesh
Verify the quality of the finite elements
a. Elements: Verify / Quad / All.
b. Click Apply.c. Review the summary table.
a
b
c
WS8B-25NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 5. Verify Mesh
Perform specific quality tests on the elements.
a. Elements: Verify / Quad / Aspect.
b. Click Apply.c. Review the fringe plot.d. Repeat for Warp, Skew,
and Taper tests.e. Reset Graphics
c
a
b
d
e
e
WS8B-26NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 6. Create Material Properties
Create an isotropic materiala. Materials: Create / Isotropic
/ Manual Input.b. Enter aluminum as the
Material Name.c. Click Input Properties.d. Enter 10e6 for the elastic
modulus and 0.3 for the Poisson Ratio.
e. Click OK. f. Click Apply.
d
e
a
b
c
f
WS8B-27NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
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Step 7. Create Element Properties
Create element propertiesa. Properties: Create / 2D /
Shell.b. Enter plate as the Property
Set Name.c. Click Input Properties.d. Click on the Select
Material Icon.e. Select aluminum as the
material.f. Enter 0.125 for the
thickness.g. Click OK.
a
b
c
WS8B-28NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 7. Create Element Properties
Select application regiona. Click in the Select
Members box.b. Rectangular pick
the surfaces as shown.
c. Click Add.d. Click Apply.
b
a
c
d
WS8B-29NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 8. Apply Boundary Conditions
Create the boundary conditiona. Loads/BCs: Create /
Displacement / Nodal.b. Enter fixed as the New Set
Name.c. Click Input Data.d. Enter <0 0 0> for
Translations and <0 0 0>for Rotations.
e. Click OK.
d
e
a
b
c
WS8B-30NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 8. Apply Boundary Conditions
Apply the boundary conditiona. Click Select
Application Region.b. Select the Curve or
Edge filter.c. Select the bottom left
edge of the surface.d. Click Add.e. Select the top left edge
of the surface.f. Click Add.g. Click OK. h. Click Apply.
g
b
c
e
d f
a
h
WS8B-31NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 8. Apply Boundary Conditions
The boundary condition should agree with what’s shown on the right
WS8B-32NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 9. Apply Loads
Create the loada. Loads/BCs: Create / Total
Load / Element Uniform.b. Enter force as the New Set
Name.c. Set the Target Element
Type to 2D.d. Click Input Data.e. Enter <50 0 0> for the Edge
Load.f. Click OK.
e
fd
b
c
a
WS8B-33NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Apply the loada. Click Select
Application Region.b. For the application
region select the right edge of the top right surface as shown.
c. Click Add.d. Select the right edge of
the bottom right surface.
e. Click Add.f. Click OK.g. Click Apply.
Step 9. Apply Loads
b
c
f
ed
ag
WS8B-34NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 9. Apply Loads
The loads and boundary condition should agree with what’s shown on the right.
WS8B-35NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 10. Run Linear Static Analysis
Analyze the modela. Analysis: Analyze / Entire
Model / Full Run.b. Click Solution Type.c. Choose Linear Static.d. Click OK. e. Click Apply.
a
e
b
d
c
WS8B-36NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 11. Post Process with MSC.Patran
Attach the results filea. Analysis: Access Results /
Attach XDB / Result Entities.
b. Click Select Results File.c. Choose the results file
tension_coupon_b.xdb.d. Click OK. e. Click Apply.
a
b
c
e
d
WS8B-37NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 11. Post Process with MSC.Patran
Erase geometrya. Display: Plot/Erase.b. Under Geometry click
Erase.c. Click OK.
a
b
c
WS8B-38NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 11. Post Process with MSC.Patran
Create a Quick Plot of X Component Stress
a. Results: Create / Quick Plot.
b. Select Stress Tensor as the Fringe Result.
c. Select X Componentas the Fringe Result Quantity.
d. Click Apply.e. Record the maximum X
component stress.
Max X Stress = ________
a
b
c
d
WS8B-39NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation
Step 11. Post Process with MSC.Patran
a
b
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Turn off averaginga. Results: Create /
Fringe.b. Select Stress Tensor
as the Fringe Result.c. Select X Component
as the result quantity.d. Click on the Plot
Options Icon.e. Change the
Coordinate Transformation to CID.
f. Select Coordinate 0.g. Change the Averaging
Definition Domain to None.
h. Click Apply.
Max X Stress = ________
f
WS8B-40NAS120, Workshop 8B, May 2006Copyright© 2005 MSC.Software Corporation