Exer06 Simple Solid

8/9/2019 Exer06 Simple Solid

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Simple Solid 6-1

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Simple Solid

6


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Simple Solid 6-2

Model Description:

This example is used to show some simple solid modeling while keeping the number of nodes of

the solid mesh under the 300 node limit of the demonstration version.


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Simple Solid

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6-3

Exercise Procedure:

1. Create the geometry.

Click the View Style toolbar button.

Click the Dynamic Rotate toolbar button.

Rotate to the isometric view shown. (Use the Left Mouse Button.)

Set up points used to define our cutting plane.

Geometry/Solid/Primitives...

OK

Render

OK

Geometry/Point...

Methods^

X

Y

Z

V1


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Simple Solid 6-4

Click curves 4,9,10 in any order and press OK after each selection.

Select Solid 1.

The plane definition dialog box is shown, but before filling in the boxes, set the Snap mode to

Point .

Right Click on screen.

or... you could have also clicked the Snap To Point toolbar button.

Midpoint

Cancel

Geometry/Solid/Slice...

OK

Snap To Point

X

Y

Z

V1

4

10

9


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Simple Solid

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6-5

Click the three points created previously in any order, then the dialog boxes will be automatically

filled out for you.

Select the sliced top-corner section as indicated (Solid 1).

OK

Delete/Geometry/Solid...

OK

Yes

View/Autoscale (Ctrl-A)

Tools/Workplane...

On Surface...


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Simple Solid

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6-7

Select the four curves of the rectangle (Curve 25, 26, 27, & 28).

Select the rectangular boundary surface created in the previous step (Surface13).

Select the four curves at the base of the newly extruded solid (Curve 37, 38, 39, & 40).

OK

Geometry/Solid/Extrude...

Material: l Add - Protrusion

Direction: l Positive

Length: l To Depth 0.25

Surface...

OK

OK

Geometry/Solid/Fillet...

OK

Radius: 0.1

OK


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Simple Solid 6-8

View this model as a solid. We are done creating the geometry.

Turn off the workplane. Right Click on screen.

Uncheck Draw Workplane.

Click the View Style toolbar button.

This puts you in the OpenGL graphics mode.

Workplane...

Draw Workplane

Done

View/Autoscale (Ctrl-A)

Solid


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Simple Solid

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6-9

2. Apply loads to the model.

Select the side surface A as indicated (Surface 15).

3. Apply constraints to the model.

Model/Load/On Surface...

Title: load

OK

OK

Select the load type. Force Per Area

Direction: l Normal to Surface

Magnitude: -500

OK

Cancel

Model/Constraint/On Surface...

Title: constraint

OK

A

B


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Simple Solid 6-10

Select the bottom surface, B, as shown (Surface 2).

4. Mesh the solid.

The default values for solid meshing determined by MSC/N4W are usually adequate to produce a

good mesh. However, in this case we want a coarser mesh in order to keep the number of nodes

down below 300. Enter an element size of 0.2.

Note:

Remember, there are no units in MSC/N4W. All dimensions must be kept consistent with the unit

system you used to define your material properties. Always make sure this is correct from the

beginning because there is no way to correct inconsistencies in units once the model is built.

Uncheck Midside Nodes.

OK

DOF: l Fixed

OK

Cancel

Mesh/Geometry/Solids...

Element Size: 0.2

OK

Load...

Library Entry: 7075-T651 Al Plate .25-.5

OK

OK

Midside Nodes

OK


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Simple Solid

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6-11

Note:

Turning off the automatic insertion of midside nodes is not a recommended practice for any model,

because the four noded tetrahedral elements will behave too stiffly to get accurate answers. It is

only done here to keep the number of nodes below 300.

The model is now ready for analysis.

5. Get acquainted with postprocessing.

For this example we included an MSC/N4W model file with results that you can use for postpro-cessing. If you ran your own analysis, you may use those results.

Find the mscn4w30\examples directory and choose the msolidp.mod file.

If you wish to save the model you built, please do so. Otherwise, select No to move on.

This section will take you through some of the ways you can use MSC/N4W to view the analysis

results.

Click the Quick Options toolbar button or press (Ctrl-Q).

File/Open...

File name: msolidp.mod

Open

No

Geometry Off

Labels Off

Done

Quick Options


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Simple Solid 6-12

Click the Dynamic Display toolbar button.

Rotate the view to see the deformations and contours on all sides of the model. (Click left mouse

button and drag.)

View/Select... (F5)

Deformed Style: l Deform

Contour Style: l Contour

Deformed and Contour Data...

Output Set: 1..MSC/NASTRAN Case 1

Deformation: 1..Total Translation

Contour: 60031..Solid Von Mises Stress

OK

OK

Dynamic Display


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6-13

When done viewing:

Adjust the slider bar to move the cutting plane through the model. Define a different cutting

plane using the plane definition dialog box. Press the Dynamic Display button to rotate the view

of the cutting plane.

When done:

Adjust the slider bar to change the value of the isosurface being shown. The isosurface itself is cal-

culated from the output vector chosen for the contour vector. Put a value in the Value box and

press Apply to see an isosurface at that value. Rotate the view if you like.

When done:

OK

View/Advanced Post/Dynamic Cutting Plane...

Plane...

OK

OK

View/Advanced Post/Dynamic IsoSurface...

OK

View/Select... (F5)

Contour Style: l IsoSurface


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Simple Solid 6-14

You can view a different isosurface by changing the IsoSurface At value.

Use View / Advanced Post / Dynamic IsoSurface... to dynamically change the isosurface value.

When done:

OK

View/Options... (F6)

Category: l PostProcessing

Options: IsoSurface

Contour Deformed

Apply

IsoSurface At: (any)

Apply

OK

View / Advanced Post / Dynamic IsoSurface...

OK

View/Select... (F5)

Deformed Style: l Animate

Contour Style: l Contour

OK

View/Options... (F6)

Category: l PostProcessing

Options: Animated Style


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6-15

Change the number of Frames to get a smoother animation. Increase the Delay to slow down the

animation.

Select the Contour/Criteria Levels option. Check the Animate box to animate the contour colors

along with the deformation.

This is the end of the example. Before moving on, experiment with some of the different postpro-

cessing and viewing options on your own.

Apply

Options: Contour/Criteria Levels

Animate

Apply


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Simple Solid 6-16

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Exer06 Simple Solid