Modifying geometry

00:00

In this video, you’ll: identify model features that need to be suppressed, unsuppressed, or modified for analysis based on results,

00:14

and select appropriate workflows for modifications.

00:19

After completing a simulation and interpreting the results, you may wish to make changes to the design geometry,

00:27

depending on those results.

00:30

First, open the file Modifying Geometry.f3d.

00:36

In the Simulation workspace, solve the study.

00:40

From the Browser, right-click Results and click View Results.

00:46

In the Results Details dialog, from the legend, expand the display drop-down and select Stress.

00:54

Then, ensure Von Mises is selected.

00:58

You can see from both the tag and the legend that the maximum stress experienced by this design is 134.5 MPa,

01:08

which is high for the designed load.

01:12

You can reduce the stress by modifying the geometry of the model.

01:17

In addition to the high amount of stress, the simulation results also show that the fillets and chamfers at the base of the model

01:27

do not contribute to its strength.

01:30

Therefore, these can be removed.

01:33

Click Finish Results.

01:37

On the Toolbar, click Simplify.

01:40

Now, it is time to remove the chamfers and fillets of the model.

01:45

Removing excessive features also speeds up the calculation time.

01:50

Clone the simulation model.

01:53

From the Browser, right-click Simulation Model 1, and, from the shortcut menu, select Clone Simulation Model.

02:03

This opens the Clone Simulation dialog.

02:06

From the list of studies, ensure Study 1 – Static Stress is selected and then click OK.

02:14

The Browser updates with a duplicated simulation model.

02:19

With the model active, expand the Modify drop-down and select Remove Features.

02:26

In the canvas, select the model.

02:29

Back in the dialog, under Features, ensure Select All is checked.

02:35

Then, click Delete.

02:38

All unwanted fillets are removed.

02:41

Now, add a fillet to the elbow of the model.

02:45

Expand the Modify drop-down and select Fillet.

02:49

The Fillet dialog displays.

02:52

In the canvas, select the edge of the inside corner of the elbow.

02:58

In the Specify radius values input field, enter . 5.

03:04

Back in the Fillets dialog, click OK.

03:07

Finally, shorten the length of the top arm.

03:12

Expand the Modify drop-down and select Press Pull.

03:17

The Press Pull dialog displays.

03:20

Select the face at the end of the arm to be shortened.

03:24

In the values input field, enter -1.0.

03:29

Back in the dialog, click OK.

03:33

Once the model has been simplified, from the Toolbar, select Finish Simplify.

03:38

Now you can solve the study again.

03:42

From the Toolbar, Solve panel, click Solve.

03:46

The Solve dialog displays.

03:48

Click Solve to confirm.

03:51

Solving a study updates the mesh as well as the results.

03:56

In the canvas, the new results display.

04:00

In the Results Details dialog, from the legend, expand the display drop-down and select Stress.

04:07

Then, ensure Von Mises is selected.

04:11

You can see that the area of high stress has been reduced.

04:15

From the toolbar, select Finish Results and ensure the file is saved.