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WORKSHOP 8 VARIOUS METHODS OF SOLID MESHING

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Page 1: 06 Ws08 Lug Mesh Meth

WORKSHOP 8

VARIOUS METHODS OF SOLID MESHING

Page 2: 06 Ws08 Lug Mesh Meth
Page 3: 06 Ws08 Lug Mesh Meth

Problem Description Import a parasolid solid. Use the geometry to create the geometry

for use with either the IsoMesh or TetMesh. Create the geometry for use with the IsoMesh by breaking the original solid into a set of six faced blue parametric solids. The actions used to do this are 1) create breaking planes, 2) break the solid several times, 3) refit some of the white solids to be blue solids, and 4) mirror. Create geometry for use with the TetMesh by breaking the original solid two times. This is done only to create solid faces for use in creating pressure loading. The original solid could be TetMeshed as is. Four sets of solids are created. The various sets are meshed with hex8, hex20, tet4 or tet10 topologies. The four models are completed and analyzed using MSC.Nastran. Finally, the results for the models are viewed in MSC.Patran. A brief comparison is made of the results.

Page 4: 06 Ws08 Lug Mesh Meth

Suggested Exercise Steps1. Create a new database called lug.db.

2. Import a parasolid solid using the file lug.xmt.

3. Rename the default group, create a new group, and place a copy of the original solid in the new group. Groups will be used to separate the four models. This will make it easier to work with them.

4. Post(show) only the group for the hex8 element mesh.

5. Create three points to be used for creating a plane for breaking the solid.

6. Create two breaking planes.

7. Break the hex8 solid twice.

8. Create five points, these will be used in creating more breaking planes.

9. Create two more breaking planes.

10. Break the solid twice

11. Create a point and plane.

12. Break the solid.

13. Practice using Plot/Erase, and refit the solids to make all solids blue parametric solids.

14. Delete the unwanted solid(from first break; at top of model).

15. Mirror the five blue solids so that they appear where the deleted solid was.

Page 5: 06 Ws08 Lug Mesh Meth

Suggested Exercise Steps (Cont.)16. Create a group for the hex20 mesh model, copy the hex8 geometry into it

and post the group with the tet4 geometry.

17. Edit the tet4 geometry by breaking the solid twice.

18. Create a group for the tet10 mesh, copy the tet4 geometry into it, and post all the groups.

19. Create a cylindrical coordinate system at the center of the hole for the hex8 model.

20. Post just the hex8 group, IsoMesh with hex8 topology, then repeat for the hex20 group, using hex20 topology.

21. Post just the tet4 group, TetMesh with tet4 topology, then repeat for the tet10 group, using tet10 topology.

22. Post all four groups. Display the element free edges, equivalence, then display the free edges again.

23. Create pressure loads and constraints for all four models. First, create three more cylindrical coordinate systems for the other three models by translating the original coordinate frame for the hex8 model. Use the coordinate systems to create four fields. Each field corresponds to a unique model. The fields use the function sinr(‘T). Having created four fields, create four pressure loadings using a scalar factor of 1000.0, so the loading for each model is 1000*sinr(‘T). Each model is constrained on its back faces.

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Suggested Exercise Steps (Cont.)24. Create material and element properties.

25. Check the default load case to see that all the pressure and constraints have been applied.

26. Perform the analysis of the four models using MSC.Nastran.

27. Post process the results. First, attach the XDB file. Display the deformed shape with and without the undeformed models and geometry. Add the von Mises stress fringe to the display. Create three more viewports . Post each group to the corresponding viewport. Display the deformed shape and stress fringe for each group in each viewport.

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Step 1. Create New Database for 3D Lug

Create a new database called lug.db

and set the model preferences.

a. File / New.

b. Enter lug as the file name.

c. Click OK.

d. Set the Tolerance by clicking

on Based on Model.

e. Enter 10.0 for the Approximate

Model Dimension

f. Set the Analysis Code and

Analysis Type to MSC.Nastran

and Structural, respectively.

g. Click OK.

a

b ce

d

Page 8: 06 Ws08 Lug Mesh Meth

Step 2. Import the Parasolid.xmt File

Import the existing parasolid

and change views.

a. File / Import.

b. Select lug.xmt and click

Apply.

c. Click OK.

d. Select Iso 1 View icon.

a

b

c

d

Page 9: 06 Ws08 Lug Mesh Meth

Step 2. Import the Parasolid .xmt File (Cont.)

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Step 3. Rename, Create New Group, and Translate Geometry.

Rename the default group and create

a new group for the Tet4 geometry.

a. Group / Modify.

b. Click Rename.

c. Enter hex8 for new name and

click Apply.

d. Group / Create.

e. Enter tet4 under New Group

Name.

f. Select Make Current box.

g. Click Apply and Cancel.

a

b

c

d

ef

g

Page 11: 06 Ws08 Lug Mesh Meth

Step 3. Rename, Create New Group, and Translate Geometry (Cont.)

Copy the solid(Solid 1) into

the tet4 group.

a. Geometry :

Transform / Solid /

Translate.

b. Enter <0 -10 0>

under Translation

Vector.

c. Turn off Auto

Execute. Select the

solid by dragging the

mouse cursor over it.

d. Click Apply.

a

b

d

c

c

Page 12: 06 Ws08 Lug Mesh Meth

Step 4. Post Only the Hex8 Group.

Post only the group hex8.

a. Group / Post…

b. Unselect the tet4

group from the list of

group names.

c. Click Apply then

Cancel.

d. Click Fit View icon.

e. Reset graphics to

eliminate the orange

lines.

a

b

c

de

Page 13: 06 Ws08 Lug Mesh Meth

Step 5. Create Points for Plane Creation

Create the points that will be

used later to create several

breaking planes.

a. Geometry : Create / Point

/ Extract.

b. Make sure the

Parametric Position is

set to 0.5.

c. Turn Auto Execute off.

d. Shift-click three edges:

the two edges that make

up the outer radius of the

solid, and one of the back

edges.

e. Click Apply.

f. Increase Point size.

a

b

ce

d

f

c

Page 14: 06 Ws08 Lug Mesh Meth

Step 6. Create the First Two Planes

Create two planes that will be

used for breaking the solid.

a. Geometry : Create /

Plane / 3 Points.

b. Click under Point 1 List.

Select the first point for

the first plane. Then, select

the other two points. Note,

with Auto Execute on the

mouse focus changes to

the next line automatically.

c. Select next 3 points to

create the second

plane.

a

c

b

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Step 7. Break Solid

Break the solid using the newly

created planes.

a. Geometry : Edit / Solid /

Break.

b. Option : Plane

c. Turn off Auto Execute.

Select the Lug for Solid

List(Solid 1)

and Plane 2 for Break

Plane List.

d. Click Apply.

e. Click Yes when message

pops up.

f. Select lower solid for Solid

List(Solid 4) and Plane 1

for Break Plane List.

g. Repeat steps d and e.

a

b

c

d

e

Plane 2

Plane 1

Page 16: 06 Ws08 Lug Mesh Meth

Step 8. Create More Points for Breaking Planes

Create 5 points that will be used

to create several planes.

a. Geometry : Create / Point

/ Extract.

b. Make sure Parametric

Position is set to 0.5.

c. Shift select 5 edges:

four edges that make

up the lower half of the

lug-hole, and an edge at

the base of the solid.

d. Click Apply.

a

b

d

c

c

Page 17: 06 Ws08 Lug Mesh Meth

Step 8. Create More Points (Cont.)

Create points at the center of

the hole of the Lug.

a. Geometry : Create / Point

/ ArcCenter

b. Turn Auto Execute off.

c. Shift click two edges that

make up the hole of the

lug.

d. Click Apply.

a

dc

b

b

Page 18: 06 Ws08 Lug Mesh Meth

Step 9. Create More Breaking Planes

Create two more planes that

will be used to break the

solids again.

a. Geometry : Create /

Plane / 3 Points.

b. Select three points that

define a plane and it

will automatically be

created.

c. Select the next three

points for the next

plane.

a

bb

c

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Step 10. Break Solids Again

Break the solids again, this

time, using the newly created

planes.

a. Geometry : Edit / Solid /

Break.

b. Select bottom left

portion of solid(Solid 5)

and break along Plane 3.

c. Click Apply.

d. Click Yes when message

appears.

e. Select bottom right

portion of solid(Solid 6)

and break along Plane 4.

f. Repeat steps c and d.

a

b

c

d

eb

Page 20: 06 Ws08 Lug Mesh Meth

Step 11. Create Final Point and Plane.

Now create the last point that will

be used to create one more plane.

a. Geometry : Create / Point /

Project.

b. Select the point at the

bottom end of the sloped

edge where it intersects

with the base, under Point

List.

c. Select edge normal to the

hole.

e. Geometry : Create / Plane /

3 Points.

f. Select two points along the

base of the solid and point

from projection.

a

b

c

d

e

g

f

b

c

f

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Step 12. Break Solid

Break a solid one final time

using the recently created plane.

a. Geometry : Edit / Solid /

Break.

b. Option : Plane

c. Select solid at bottom-right

for Solid List(Solid 9).

d. Select Plane 5 for Break

Plane List.

e. Click Apply.

f. Click Yes when

message appears.

a

b

c

d

e

f

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Step 13. Erase all Geometry, Plot Desired Solids, and Refit

Erase all of the geometry from the screen, then

plot only the desired five solids. Then, refit the

five solids so that they become parametric

(blue) solids.

a. Click the Plot/Erase icon.

b. Shift-click the 5 solids at the bottom

of the geometry, under Selected

Entities.

c. Click the Erase button under Geometry.

d. Click the Plot button under Selected

Entities and click OK.

e. Geometry : Edit / Solid / Refit.

f. Option : To TriCubicNet

g. Enter 1 for all of the Refit Parameters.

h. Select Delete Original Solids.

i. Select all five solids by dragging a

box around them.

j. Click Yes when first message

appears and Yes for All when second

message appears.

a

b

c

d

e

f

g

h

i

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Step 14. Replot and Delete Unwanted Geometry

Replot all of the geometry and

delete all the unwanted sections

of the model, namely, the top

solid and the planes.

a. Click on the Plot/Erase

icon.

b. Click Plot under

Geometry and click OK.

c. Geometry : Delete / Solid.

d. Select top solid and click

Apply.

e. Geometry : Delete / Plane

f. Select all five planes by

dragging a box around the

entire solid.

g. Click Apply.

b

c

d

e

fg

a

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Step 15. Complete the Geometry for the Hex Mesh

Finish creating all the geometry

by mirroring the five parametric

solids, producing a complete

parametric model.

a. Geometry : Transform /

Solid / Mirror.

b. Select the 3 Points for

Plane icon under Define

Mirror Plane Normal.

c. Select any 3 points that

lie in the plane in figure

d. Make sure the Reverse

Solid box is checked

e. Select all the solids, and

click Apply.

a

b

d

e

b

Select any 3 points that lie within this plane. This plane will serve as the mirror plane.

c

Page 25: 06 Ws08 Lug Mesh Meth

Step 16. Create Group, Copy Geometry, and Post only Tet4 Group

Create the Hex20 group and

translate the geometry.

a. Group : Create

b. Enter hex20 for New

Group Name.

c. Click Apply and Cancel.

d. Geometry : Transform /

Solid / Translate.

e. Enter <15 0 0> for Trans-

lation Vector.

f. Select all ten solids and

click Apply.

g. Group : Post.

h. Select group tet4.

i. Click Apply, then Cancel.

j. Click Fit View icon.

a

b

c

d

e

f

g

h

i

j

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Step 17. Edit Solid for TetMesh

Edit the parasolid solid in group tet4

by creating three points, exactly as

the first three points were created for

the hex8 model.

a. Geometry : Create / Point

/ Extract.

b. Make sure the

Parametric Position is

set to 0.5.

c. Shift-click three edges:

the two edges that make

up the outer radius of the

solid, and one of the back

edges.

d. Click Apply.

a

b

c

d

c

Page 27: 06 Ws08 Lug Mesh Meth

Step 17. Edit Solid for TetMesh (Cont.)

Continue editing the solid by

creating two planes.

a. Geometry : Create /

Plane / 3 Points.

b. Select 3 points to create

the first plane.

c. Click Apply.

d. Next, select 3 points to

create the second

plane.

e. Click Apply.

a

b

c

The planes being created in this step have the same relative location as the planes for the hex8 group.

bd

b

Page 28: 06 Ws08 Lug Mesh Meth

Step 17. Edit Solid for TetMesh (Cont.)

Break the solid into four parts along the planes, then delete the planes.

a. Geometry : Edit / Solid / Break.b. Option : Planec. Select Solid 2 for Solid

List and Plane 2 for Break Plane List.

d. Click Apply.e. Click Yes when message pops up. f. Shift-click both halves of the solid for Solid List and select Plane 1 for Break Plane List.g. Repeat steps d and e.h. Geometry : Delete / Plane. i. Select all planes and click Apply.

a

b

c

d

e

c

f

Page 29: 06 Ws08 Lug Mesh Meth

Step 18. Create Group, Translate Geometry, and Post All

Create a final group, tet10, and

Translate(copy) the newly created

solids. Then post all four models.

a. Group : Create

b. Enter tet10 under New Group

Name.

c. Click Apply, then Cancel.

d. Geometry : Transform / Solid /

Translate.

e. Enter <15 0 0> for

Translation Vector.

f. Select all four solids in group

tet4 and click

Apply.

g. Group : Post.

h. Click Select All button.

i. Click Apply, then Cancel.

a

b

c

d

h

g

f

e

i

Page 30: 06 Ws08 Lug Mesh Meth

Step 18. Create Group, Translate Geometry, and Post All (Cont.)

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Step 19. Create a Coordinate System

Create a cylindrical coordinate

system for the hex8 model. This

coordinate frame will later be used to

apply a radial pressure. It is not

necessary to create coordinate

frames for the other models, because

this frame will later be translated to

the other three models.

a. Geometry : Create / Coord /

3Point.

b. Type : Cylindrical.

c. Select 3 points (as indicated).

Point on Plane 1-3

Origin

Point on Axis 3

This is what the coordinate system should look like for the hex8 model.

a

b

c

Page 32: 06 Ws08 Lug Mesh Meth

Step 20. IsoMesh the Hex8 and Hex20 Groups

Mesh solids for the hex8 and hex 20

groups using the IsoMesher.

a. Group : Post

b. Select the hex8 group.

c. Click Apply, then Cancel.

d. Elements : Create / Mesh / Solid.

e. Select Hex, IsoMesh, and Hex8.

f. Remove check on Automatic

Calculation and enter 0.5 for

Global Edge Length.

g. Select the hex8 geometry and

click Apply.

h. Repeat steps a through g, posting

the hex20 group, selecting

Hex20 instead of Hex8 for the

Topology and applying it to the

hex20 geometry.

Note the difference between the hex8 and hex20 meshes, namely the midsize nodes.

It may be necessary click the Refresh Graphics and the Fit View icons when switching from group to group.

a

d

e

f

g

h

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Step 21. TetMesh the Tet4 and Tet10 Groups

Now, create the final two meshes for the remaining models. This time, the TetMesh-er will be utilized.

a. Group : Postb. Select the tet4 group.c. Click Apply, then Cancel.d. Elements : Create / Mesh / Solid.e. Select Tet, TetMesh, and Tet4.

f. Select the tet4 geometry, Solid 35:38, for the Input List.

g. Remove check on Automatic Calculation and enter 0.5 for Global Edge Length.

h. Click on Assembly Parameters… and and click on Match Parasolid Faces. i. Select tet4 solids again.

j. Click Close. k. Click Apply.

l. Repeat steps a through k, posting the tet10 group, selecting Tet10 for the Topology instead of Tet4, and applying it to the tet10 geometry.

Note the absence or presence of midside nodes.

d

e

g

f

i

h

k

h

j

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Step 22. Observe Element Free Edges of Meshed Solids

Post all four groups and observe the

element free edges.

a. Group : Post.

b. Select all four groups.

c. Click Apply, then Cancel.

d. Elements : Verify /

Element / Boundaries.

e. Click Apply (Observe the free

element edges of meshes.

This can be easily remedied by

equivalencing the meshes),

f. Elements : Equivalence

/ All / Tolerance Cube.

g. Click Apply.

h. Elements : Verify /

Element / Boundaries.

i. Click Apply.

The yellow lines indicate the element free edges. Here, the elements are not connected.

After equivalencing, the elements are connected and the only yellow lines are for the desired free edges.It is not necessary to post each

group and equivalence each model. The equivalence “All” action is applied to all 4 models.

d

e

f

g

Page 35: 06 Ws08 Lug Mesh Meth

Step 23. Create Loads and Boundary Conditions

In order to create the loads and

boundary conditions, the

cylindrical coordinate system for

the hex8 model must be

translated to the remaining

models.

a. Geometry : Transform /

Coord / Translate.

b. Enter <15 0 0> for Trans-

lation Vector.

c. Select Coord 1 for

Coordinate Frame List.

d. Repeat steps a through c

for creating Coords 3 and

4 using <0 -10 0> for the

Translation Vector, and

selecting both coordinate

frames Coord 1 and Coord 2

for the Coordinate Frame

List.

a

b

c

Page 36: 06 Ws08 Lug Mesh Meth

Step 23. Create Loads and Boundary Conditions (Cont.)

Create a field for each pressure loading.

a. Click on the Smooth Shaded icon.b. Fields : Create / Spatial / PCL Function.c. Enter sin_pressure_hex8 for Field Name.d. Select Coord 1 for Coordinate System.e. Enter sinr(‘T) for Scalar Function and click Apply. f. Create 3 more fields by following steps c through e. Refer to the table below for the corresponding field names and coordinate frames.

Field Name Coordinate System

sin_pressure_hex8 Coord 1

sin_pressure_hex20 Coord 2

sin_pressure_tet4 Coord 3

sin_pressure_tet10 Coord 4

There should be four different fields, and each field name should reference a corresponding coordinate frame (i.e., there should be one field per model.) When creating the fields it is not necessary to post each group separately.

b

c

d

e

a

Page 37: 06 Ws08 Lug Mesh Meth

Step 23. Create Loads and Boundary Conditions (Cont.)

Create four pressures, one for each

model, using the created fields.

a. Loads/BCs : Create :

Pressure / Element Uniform.

b. Enter hex8 for New Set

Name.

c. Click on Input Data…

d. Enter 1000 under Load/BC

Set Scale Factor.

e. Under Pressure, select

sin_pressure_hex8 from

Spatial Fields.

f. Click OK.

a

b

c

d

e

f

Page 38: 06 Ws08 Lug Mesh Meth

Step 23. Create Loads and Boundary Conditions (Cont.)

Set the application region for the pressure.

a. Click on the

Select

Application

Region.

b. Shift-click the four

faces (as

indicated) and

click Add.

c. Click OK.

d. Click Apply

a

b

c

d

Select these four faces for the application region for the hex8 pressure.

b

Page 39: 06 Ws08 Lug Mesh Meth

Step 23. Create Loads and Boundary Conditions (Cont.)

Pressure Name Spatial Field

hex8 sin_pressure_hex8

hex20 sin_pressure_hex20

tet4 sin_pressure_tet4

tet10 sin_pressure_tet10

These are two typical faces where the pressures for the tet4 and tet10 groups should be applied.

Repeat the previous steps for the remaining three pressures, zooming in on each model as needed. After all four pressures are created, click the Fit view icon to show all the models. The viewport should match the illustration below. Included is a table of the pressure names and the corresponding spatial fields.

These are four typical faces where the pressures for the hex8 and hex20 groups should be applied.

Page 40: 06 Ws08 Lug Mesh Meth

Step 23. Create Loads and Boundary Conditions (Cont.)

Create constraints on each model

with just one constraint set.

a. Loads/BCs : Create /

Displacement / Nodal.

b. Enter constraint for

New Set Name.

c. Click Input Data…

d. Enter <0 0 0> for

Translations only.

e. Click OK.

f. Click Select Application

Region…

g. Click the Surface or Face

icon.

h. Shift-click the back faces of all

the models(see next page)

and click Add, then OK.

i. Click Apply.

a

b

c

d

e

f

g

h

i

g

Page 41: 06 Ws08 Lug Mesh Meth

Step 23. Create Loads and Boundary Conditions (Cont.)

Page 42: 06 Ws08 Lug Mesh Meth

Step 24. Create Material and Element Properties

Create the material properties for

the models.

a. Materials : Create / Isotropic

/ Manual Input.

b. Enter Aluminum for

Material Name.

c. Click Input Properties…

d. Enter 10E6 and 0.3 for the

Elastic Modulus and

Poisson Ratio, respectively.

e. Click OK.

f. Click Apply.

a

b

c

d

e

f

Page 43: 06 Ws08 Lug Mesh Meth

Step 24. Create Material and Element Properties (Cont.)

Create the element properties using one

property set.

a. Properties : Create / 3D / Solid.

b. Enter Solid for Property

Set Name.

c. Click Input Properties…

d. Click on Mat Prop Name icon and select aluminum.

e. Click OK.

f. For Application Region, select all

solids, and click Add.

g. Click Apply.

a

b

c

d

e

f

g

Page 44: 06 Ws08 Lug Mesh Meth

Step 25. Check the Load Case

Check the load case Default to ensure that all the pressure loads and the constraint have been included.

a. Load Cases : Modify.

b. Click on load case name

Default.

c. Make sure all the loads and

constraint are listed, and click

Cancel.

Even though there are four disjoint(unrelated) models in this database, MSC.Patran views them as one model. MSC.Nastran will solve the models as one model as long is each model is correctly defined.

a

b

c

Page 45: 06 Ws08 Lug Mesh Meth

Step 26. Run Analysis

Run the analysis by submitting

the model to MSC.Nastran.

a. Analysis : Analyze / Entire

Model / Full Run.

b. Click Translation

Parameters…

c. Make sure XDB and Print

is selected for Data

Output and click OK.

d. Click on Solution Type…

e. Make sure Linear Static

is selected and click OK.

f. Click Apply.

a

b

c

d

e

f

Page 46: 06 Ws08 Lug Mesh Meth

Step 27. Read and Display Analysis Results

Read and compare the results for

the four models. First, attach the

XDB file.

a. Analysis : Access Results / Attach XDB / Result Entities.

b. Click Select Results File…

c. Select lug.xdb and

click OK.

d. Click Apply.

a

b

c

d

Page 47: 06 Ws08 Lug Mesh Meth

Step 27. Read and Display Analysis Results (Cont.)

Create a deformation plot of all four

models. It will be difficult to see the

deformation with the undeformed

shape and geometry posted. So,

unpost both.

a. Results : Create / Deformation.

b. Select Displacements,

Transitional and click Apply.

c. Click on the Display Attibutes

icon.

d. Remove check from Show

Undeformed and Show Title

and click Apply.

e. Click on Plot/Erase icon.

f. Click Erase under Geometry,

and click OK.

a

b

f

e

c

d

Page 48: 06 Ws08 Lug Mesh Meth

Step 27. Read and Display Analysis Results (Cont.)

Page 49: 06 Ws08 Lug Mesh Meth

Step 27. Read and Display Analysis Results (Cont.)

Plot the von Mises

stress for each of the

models.

a. Results : Create /

Fringe.

b. Select Stress,

Tensor and von

Mises.

c. Click Apply.

a

b

c

Page 50: 06 Ws08 Lug Mesh Meth

Step 27. Read and Display Analysis Results (Cont.)

Here is the deformed shape plotted with the von Mises stress. Note that it is somewhat difficult making a comparison between each of the models because each model is referenced to the same color chart. Throughout the next series of steps, each model will be assigned to an individual view port. This will allow for much easier comparisons between each model.

Page 51: 06 Ws08 Lug Mesh Meth

Step 27. Read and Display Analysis Results (Cont.)

Modify the current viewport and

create three others.

a. Viewport : Modify.

b. Click Rename…

c. Enter hex8 under Rename

As.

d. Click Apply, then Cancel.

e. Viewport : Create.

f. Enter hex20 and click Apply.

g. Repeat step for creating

viewports tet4 and tet10.

h. Click Cancel.

i. Viewport : Tile.

There should now be four separate viewports. The next step will involve posting only one unique group per viewport.

a

b c

f

h

d

Page 52: 06 Ws08 Lug Mesh Meth

Step 27. Read and Display Analysis Results (Cont.)

Unpost the Coordinate frames and post each modelwith its corresponding viewport.

a. Click on Display: Coord. Frames…

b. Select Unpost All and click OK.c. Select the hex8 viewport by clicking on it.d. Group : Post.e. Select the hex8 group and click Apply.f. Click on the Fit view icon.g. Follow steps d through g for the remaining viewports, selecting each one and posting the corresponding group. h. Cancel from the group dialogue.

b

d

e

h

f

a

Page 53: 06 Ws08 Lug Mesh Meth

Step 27. Read and Display Analysis Results (Cont.)

Create the deformation and the fringe of the von Mises Stressfor the model in each viewport.

a. Make the viewport hex8 current by clicking in it.b. Results : Create / Deformation.c. Select Displacements, Transitional and click Apply.d. Results : Create / Fringe.e. Select Stress Tensor and von Mises. f. Click Apply.g. Repeat steps a through f for the remaining viewports.

b

c

c

d

Page 54: 06 Ws08 Lug Mesh Meth

Here is an illustration of the four tiled viewports with the corresponding model and results, each having a maximum stress value indicated. Note the similarity between results for the hex meshes and the tet10 mesh. The tet4 mesh model is very inaccurate. The TetMesh is a very convenient approach because it is not necessary to break up the solid into many parts, unlike the IsoMesh technique.

Step 27. Read and Display Analysis Results (Cont.)