workshop 9a 2½ d clamp – sweep mesher · 2½ d clamp – sweep mesher. ws9a-2 nas120, workshop...
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WORKSHOP 9A
2½ D CLAMP – SWEEP MESHER
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WS9A-2NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
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WS9A-3NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Workshop ObjectivesPractice the construction of a 2 ½ D solid model by sweeping 2D elements.
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WS9A-4NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Problem DescriptionAnalyze the clamp shown below:
60 mm
100 mm150 mm
200 mm
30 mm
30 mm
50 mmR = 10 mm
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WS9A-5NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Problem Description (cont.)A pressure loading of 1 N/mm2 is applied to the top face.Constrain the bolt hole in all three translations.Material Properties:
E = 109 x 103 N/mm2
ν =0.3
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WS9A-6NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Suggested Exercise Steps1. Create a new database. 2. Create surface geometry. 3. Mesh the surface to create CQUAD4 plate elements.4. Sweep the plate elements into solid elements. 5. Create a boundary condition.6. Create a pressure load.7. Define material properties.8. Create Physical Properties.9. Run the finite element analysis using MSC.Nastran.10. Plot displacements and stresses.
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WS9A-7NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
b c
d
f
g
h
Step 1. Create New Database
Create a new database called clamp.db
a. File / New.b. Enter clamp as the file name.c. Click OK.d. Choose Tolerance Based on
Model.e. Enter 200 for the Approximate
Maximum Model Dimension.f. Select MSC.Nastran as the
Analysis Code.g. Select Structural as the
Analysis Type. h. Click OK.
a
e
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WS9A-8NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 2. Create Surface Geometry
Create the first surfacea. Geometry: Create /
Surface / XYZ.b. Enter <150 100 0> for the
Vector Coordinate List.c. Click Apply.
a
b
c
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WS9A-9NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 2. Create Surface Geometry
Add a hole to the surfacea. Geometry: Edit /
Surface / Add Hole.b. Enter 10 for the Hole
Radius.c. Click in the Surface
box.d. Screen Pick Surface 1.e. Enter [50 50 0] for the
Center Point List.f. Click Apply.
a
b
c
ed
f
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WS9A-10NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 2. Create Geometry
a
c
Create another surfacea. Geometry: Create /
Surface / XYZ.b. Enter <50 100 0> for the
Vector Coordinate List.c. Click in the Origin
Coordinates List box.d. Screen Pick the lower right
corner of the magenta surface as origin as shown. b
d
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WS9A-11NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 3. Create Mesh
Create a surface mesha. Elements: Create /
Mesh / Surface.b. Set the Mesher to
Paver.c. Click on Paver
Parameters.d. Set the Max h/L value
to 0.05.e. Click OK.f. Click in the Surface
List box.g. Rectangular pick both
surfaces. h. Set the Global Edge
Length to 10.i. Click Apply.
a
b
df
g
h
i
e
c
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WS9A-12NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 3. Create Mesh
View the meshed surfacea. Click on the Iso 3 View
Icon.
a
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WS9A-13NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 4. Create Solid Elements
Sweep the plate elements into solid elements.
a. Elements: Sweep / Element / Extrude.
b. Click Mesh Control.c. Set the Number of
Elements to 6.d. Click OK.e. Set the Direction Vector
to <0 0 1>.f. Set the Extrude
Distance to 30.g. Click in the Base Entity
List box.h. Pick the Polygon tool
and pick the 2D elements as shown.
i. Click Apply.
a
c
ed
f
h
g
i
b
h
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WS9A-14NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 4. Create Solid Elements
Sweep the plate elements into solid elements.
a. Elements: Sweep / Element / Extrude.
b. Click Mesh Control.c. Set the number of
elements to 12.d. Click OK.e. Set the Direction Vector
to <0 0 1>.f. Set the Extrude
Distance to 60.g. Click in the Base Entity
List box.h. Pick the Polygon tool
and pick the rest of the 2D elements as shown.
i. Click Apply.
a
c
ed
f
h
g
i
b
h
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WS9A-15NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Delete the plate elementsa. Elements: Delete /
Element.b. Pick the Quad Element
Filter.c. Rectangular pick all
elements.d. Click Apply.
Step 4. Create Solid Elements
a
b
c
d
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WS9A-16NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 4. Create Solid Elements
Verify element boundariesa. Elements: Verify /
Element / Boundaries.b. Click Apply. a
b
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WS9A-17NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 4. Create Solid Elements
Equivalence the modela. Elements: Equivalence
/ All / Tolerance Cube.b. Click Apply.
a
b
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WS9A-18NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 4. Create Solid Elements
Verify element boundaries again
a. Elements: Verify / Element / Boundaries.
b. Click Apply.a
b
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WS9A-19NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 5. Create Boundary Condition
Set Picking Preferencesa. Select Preferences /
Picking b. Choose Enclose
Centroid for Rectangle/Polygon Picking.
c. Click Close.
a
b
c
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WS9A-20NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 5. Create Boundary Condition
Create the boundary conditiona. Loads/BCs: Create /
Displacement / Nodal.b. Enter bolt_hole as the
New Set Name.c. Click Input Data.d. Enter <0 0 0> for
Translations e. Click OK.
a
b
c
d
e
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WS9A-21NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Apply the boundary conditiona. Click Select
Application Region.b. For the Geometry
Filter select FEM.c. Click on Front View
Icon.d. Zoom in using View
Corners.e. Polygon pick nodes
on the bolt hole.f. Click Add.g. Click OK. h. Click Apply.
Step 5. Create Boundary Condition
g
h
c
f
b
cd
a
e
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WS9A-22NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
a
Step 6. Create Load
Create the pressure loada. Loads/BCs: Create /
Pressure / Element Uniform.
b. Enter clamp_pressure as the New Set Name.
c. Click Input Data.d. Enter 1 for the Pressure.e. Click OK.
b
e
d
c
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WS9A-23NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Apply the pressure loada. Click Select
Application Region.b. For the Geometry
Filter select FEM.c. Click on Bottom View
Icon.d. Click on Fit View Icon.e. Rectangular pick the
top surface of solid elements as shown.
f. Click Add.g. Click OK. h. Click Apply.
Step 6. Create Load
a
b
cd
e
f
g
h
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WS9A-24NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 7. Define Material Properties
Create an isotropic materiala. Materials: Create / Isotropic
/ Manual Input.b. Enter titanium as the
Material Name.c. Click Input Properties.d. Enter 109e3 for the elastic
modulus and 0.3 for the Poisson Ratio.
e. Click OK. f. Click Apply.
a
b
c
d
fe
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WS9A-25NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 8. Create Physical Properties
Create element propertiesa. Properties: Create / 3D /
Solid.b. Enter solid as the Property
Set Name.c. Click Input Properties.d. Click on the Select
Material Icon.e. Select titanium as the
material.f. Click OK.
d
e
f
a
b
c
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WS9A-26NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 8. Create Physical Properties
Apply the element propertiesa. Click in the Select
Members box.b. Select the Solid Element
filter.c. Rectangular pick all
elements as shown.d. Click Add.e. Click Apply.
c
b
a
d
e
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WS9A-27NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 9. Run Linear Static Analysis
Choose the analysis typea. 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
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WS9A-28NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 10. Plot Displacements and Stresses
Attach the results filea. Analysis: Access Results /
Attach XDB / Result Entities.
b. Click Select Results File.c. Choose the results file
clamp.xdb.d. Click OK. e. Click Apply.
a
b
c
e
d
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WS9A-29NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation
Step 10. Plot Displacements and Stresses
Create a deformation plot for the mid span result case
a. Results: Create / Quick Plot.
b. Select Stress Tensoras the Fringe Result.
c. Select Von Mises as the Fringe Result Quantity.
d. Select Displacements, Translational as the Deformation Result.
e. Click Apply.
a
d
c
e
b
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WS9A-30NAS120, Workshop 9A, May 2006Copyright© 2005 MSC.Software Corporation