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Transcript
00:01
In this video, you’ll determine the material appropriateness for a linear static stress load,
00:09
identify sufficient and appropriate loads,
00:13
classify load types,
00:14
interpret constraint information,
00:17
classify assembly connections,
00:19
evaluate whether there is sufficient information to complete an analysis,
00:24
and prioritize simulation information for analysis.
00:28
Simulation helps you understand how designs will perform in real-world environments.
00:35
A static stress study is a valuable tool for understanding how designs will perform when acted upon by forces during use.
00:44
Open the file Preparing Linear Static Stress Loads.f3d and navigate to the Simulation workspace.
00:54
The New Study dialog displays.
00:56
From here, select Static Stress.
00:59
Then, click Create Study.
01:03
In the canvas, the model updates to display the study material.
01:07
Keep in mind, however, that it is the physical properties of the material that are important to a study,
01:14
and not the appearance of the material.
01:18
When you set up a static stress study, there are certain things that will influence the model
01:24
such as its material properties, the way it is constrained to the environment, and how it is loaded with external forces and moments.
01:34
To set up the materials, from the Toolbar, expand Materials,
01:40
and then select Manage Physical Materials to open the Material Browser dialog.
01:48
Linear stress analysis is useful for linear materials and small deformations
01:54
because it does not take into account changes in stiffness or K-factor due to deformation.
02:01
Foam and rubber are examples of non-linear materials that are not appropriate for linear stress studies.
02:09
Materials for linear static stress studies must also be isotropic,
02:15
meaning their material properties are the same in every direction,
02:20
which is not the case with anisotropic materials, such as wood.
02:26
If a study is run using inappropriate materials, the result will not accurately reflect how the part would perform in real-world applications.
02:36
You can create unique simulation studies for each material you want to test,
02:42
to compare performance and determine the ideal material for the component.
02:47
Keep in mind that you can use only a single material per part per study.
02:54
For this exercise, make no changes to the material and close the Material Browser.
03:01
Next, you can pre-check the constraints and loads to ensure their accuracy.
03:06
This step is critical to the validity of the simulation result.
03:11
From the Toolbar, Solve panel, select Pre-check.
03:16
A warning dialog displays, indicating that the study cannot be solved because some important input is missing.
03:23
In this case, you will need to input structural loads and constraints.
03:29
Close the warning dialog.
03:31
First, configure the constraints.
03:34
From the Toolbar, select Structural Constraints.
03:39
This displays the Structural Constraints dialog.
03:42
Expand the Type drop-down.
03:45
From here, you can view the different structural constraint types,
03:49
such as Fixed, Pin, Frictionless, Prescribed Displacement, and Remote.
03:56
Some constraints can be applied to faces, edges, or vertices.
04:01
From the drop-down, select Fixed.
04:04
Fixed constraints are used to prevent a selected target from moving and deforming in any direction.
04:12
A common example where this is used is fixing the end of a beam or bracket.
04:18
In the canvas, select the top face of the model.
04:23
Back in the dialog, next to Targets, click X to clear the selection and open up its degree of freedom in that direction.
04:34
Expand the Type drop-down again, but this time, select Pin.
04:39
A pin constraint is applied to cylindrical surfaces to prevent the surfaces from moving or deforming in combinations of radial,
04:48
axial, or tangential directions.
04:52
In the canvas, select an interior cylindrical face.
04:57
Back in the dialog, clear the selection.
05:01
Change the Type to Frictionless.
05:05
Frictionless constraints allow a face to rotate, move, or deform tangentially, but not normal to the face.
05:14
Again, select the top face of the model.
05:18
This constraint is often used for shafts and sliders.
05:24
Clear the selection.
05:26
Change the Type to Prescribed Displacement.
05:30
Select the top face of the model.
05:33
This is used when the deflection is known but the size of the load is unknown.
05:39
In the Uy field, enter 10.
05:44
Click OK to close the dialog.
05:48
Lastly, open the Structural Constraints dialog again and change the Type to Remote.
05:54
A remote constraint restricts movement from a point in space that is distant from the model using a defined anchor location.
06:04
Select the top model, and then, back in the dialog, under Anchor Location, in the X Distance field, enter 100.
06:15
In the Y Distance field, enter 50.
06:19
In the Z Distance field, enter 50.
06:24
In the canvas, the anchor point updates.
06:27
Back in the dialog, click Cancel.
06:30
Now, it is time to configure the loads.
06:33
From the Toolbar, select Structural Loads.
06:37
In the Structural Loads dialog, expand the Type drop-down.
06:42
From here, you can choose which load type you want to apply.
06:46
Select Force.
06:48
A Force load can be applied to a face, edge, or vertex.
06:53
In the canvas, select the top face of the model.
06:58
Once applied, you can configure the direction of the force and its magnitude.
07:04
Clear the selection.
07:06
Now, change the Type to Pressure.
07:09
In the canvas, select the top two faces as the targets for the pressure load.
07:16
Pressure loads are used when loads are uniformly distributed and normal to the face.
07:24
Clear the selection.
07:26
Change the Type to Moment.
07:29
Then, select the top face of the model.
07:33
Moment loads are applied for rotational loads.
07:37
When applied to a face, the axis passes through the centroid.
07:43
Clear the selection and then, in the canvas, select the interior cylindrical face of the model.
07:50
Clear the selection again.
07:53
Change the Type to Bearing Load.
07:56
In the canvas, select the interior cylindrical face.
08:01
Bearing loads are used when concentric faces come into contact and they apply a parabolically distributed load on the face,
08:10
which is in line with the direction of force.
08:15
Clear the selection.
08:16
Change the Type to Remote Force.
08:20
Select the top face of the model.
08:22
Like the Remote constraint, the Remote Force creates a load that is at a set distance from the model.
08:30
To configure this point in space, under Source Location, in the X Distance field, enter 100.
08:39
In the Y Distance field, enter 50.
08:43
In the Z Distance field, enter 50.
08:47
An example of a remote force is determining the load on a mast when its sail is being pushed by the wind.
08:55
Enter any Force value, and then click OK.
08:59
The Remote Force load displays in the canvas.
09:03
Open the Structural Loads dialog again and change the Type to Hydrostatic Pressure.
09:10
A hydrostatic pressure load applies a linearly varying pressure to a face.
09:16
An Info dialog displays, indicating that gravity must be on to apply a hydrostatic pressure load, so it will be turned on automatically.
09:27
Click OK.
09:29
In the canvas, select the side face of the model.
09:34
Hydrostatic pressure applies to situations where pressure increases based on the depth of the model in fluid.
09:42
In the dialog, next to Select Surface Point, click the selection tool,
09:48
and then select the upper-left vertex of the selected face.
09:54
Click OK.
09:57
Gravity can be applied as a global load to a study.
10:00
From the Browser, under Study 1—Static Stress, expand Load Case1, and then expand Loads..
10:10
Keep in mind that Gravity affects masses, including applied point masses.
10:17
Since accurate simulation results rely on the replication of real-world properties and forces,
10:24
it is important to understand how materials, constraints, and loads work when setting up a simulation study.
10:33
When you have finished configuring the materials, constraints, and loads for your model, be sure to save the file.
Video transcript
00:01
In this video, you’ll determine the material appropriateness for a linear static stress load,
00:09
identify sufficient and appropriate loads,
00:13
classify load types,
00:14
interpret constraint information,
00:17
classify assembly connections,
00:19
evaluate whether there is sufficient information to complete an analysis,
00:24
and prioritize simulation information for analysis.
00:28
Simulation helps you understand how designs will perform in real-world environments.
00:35
A static stress study is a valuable tool for understanding how designs will perform when acted upon by forces during use.
00:44
Open the file Preparing Linear Static Stress Loads.f3d and navigate to the Simulation workspace.
00:54
The New Study dialog displays.
00:56
From here, select Static Stress.
00:59
Then, click Create Study.
01:03
In the canvas, the model updates to display the study material.
01:07
Keep in mind, however, that it is the physical properties of the material that are important to a study,
01:14
and not the appearance of the material.
01:18
When you set up a static stress study, there are certain things that will influence the model
01:24
such as its material properties, the way it is constrained to the environment, and how it is loaded with external forces and moments.
01:34
To set up the materials, from the Toolbar, expand Materials,
01:40
and then select Manage Physical Materials to open the Material Browser dialog.
01:48
Linear stress analysis is useful for linear materials and small deformations
01:54
because it does not take into account changes in stiffness or K-factor due to deformation.
02:01
Foam and rubber are examples of non-linear materials that are not appropriate for linear stress studies.
02:09
Materials for linear static stress studies must also be isotropic,
02:15
meaning their material properties are the same in every direction,
02:20
which is not the case with anisotropic materials, such as wood.
02:26
If a study is run using inappropriate materials, the result will not accurately reflect how the part would perform in real-world applications.
02:36
You can create unique simulation studies for each material you want to test,
02:42
to compare performance and determine the ideal material for the component.
02:47
Keep in mind that you can use only a single material per part per study.
02:54
For this exercise, make no changes to the material and close the Material Browser.
03:01
Next, you can pre-check the constraints and loads to ensure their accuracy.
03:06
This step is critical to the validity of the simulation result.
03:11
From the Toolbar, Solve panel, select Pre-check.
03:16
A warning dialog displays, indicating that the study cannot be solved because some important input is missing.
03:23
In this case, you will need to input structural loads and constraints.
03:29
Close the warning dialog.
03:31
First, configure the constraints.
03:34
From the Toolbar, select Structural Constraints.
03:39
This displays the Structural Constraints dialog.
03:42
Expand the Type drop-down.
03:45
From here, you can view the different structural constraint types,
03:49
such as Fixed, Pin, Frictionless, Prescribed Displacement, and Remote.
03:56
Some constraints can be applied to faces, edges, or vertices.
04:01
From the drop-down, select Fixed.
04:04
Fixed constraints are used to prevent a selected target from moving and deforming in any direction.
04:12
A common example where this is used is fixing the end of a beam or bracket.
04:18
In the canvas, select the top face of the model.
04:23
Back in the dialog, next to Targets, click X to clear the selection and open up its degree of freedom in that direction.
04:34
Expand the Type drop-down again, but this time, select Pin.
04:39
A pin constraint is applied to cylindrical surfaces to prevent the surfaces from moving or deforming in combinations of radial,
04:48
axial, or tangential directions.
04:52
In the canvas, select an interior cylindrical face.
04:57
Back in the dialog, clear the selection.
05:01
Change the Type to Frictionless.
05:05
Frictionless constraints allow a face to rotate, move, or deform tangentially, but not normal to the face.
05:14
Again, select the top face of the model.
05:18
This constraint is often used for shafts and sliders.
05:24
Clear the selection.
05:26
Change the Type to Prescribed Displacement.
05:30
Select the top face of the model.
05:33
This is used when the deflection is known but the size of the load is unknown.
05:39
In the Uy field, enter 10.
05:44
Click OK to close the dialog.
05:48
Lastly, open the Structural Constraints dialog again and change the Type to Remote.
05:54
A remote constraint restricts movement from a point in space that is distant from the model using a defined anchor location.
06:04
Select the top model, and then, back in the dialog, under Anchor Location, in the X Distance field, enter 100.
06:15
In the Y Distance field, enter 50.
06:19
In the Z Distance field, enter 50.
06:24
In the canvas, the anchor point updates.
06:27
Back in the dialog, click Cancel.
06:30
Now, it is time to configure the loads.
06:33
From the Toolbar, select Structural Loads.
06:37
In the Structural Loads dialog, expand the Type drop-down.
06:42
From here, you can choose which load type you want to apply.
06:46
Select Force.
06:48
A Force load can be applied to a face, edge, or vertex.
06:53
In the canvas, select the top face of the model.
06:58
Once applied, you can configure the direction of the force and its magnitude.
07:04
Clear the selection.
07:06
Now, change the Type to Pressure.
07:09
In the canvas, select the top two faces as the targets for the pressure load.
07:16
Pressure loads are used when loads are uniformly distributed and normal to the face.
07:24
Clear the selection.
07:26
Change the Type to Moment.
07:29
Then, select the top face of the model.
07:33
Moment loads are applied for rotational loads.
07:37
When applied to a face, the axis passes through the centroid.
07:43
Clear the selection and then, in the canvas, select the interior cylindrical face of the model.
07:50
Clear the selection again.
07:53
Change the Type to Bearing Load.
07:56
In the canvas, select the interior cylindrical face.
08:01
Bearing loads are used when concentric faces come into contact and they apply a parabolically distributed load on the face,
08:10
which is in line with the direction of force.
08:15
Clear the selection.
08:16
Change the Type to Remote Force.
08:20
Select the top face of the model.
08:22
Like the Remote constraint, the Remote Force creates a load that is at a set distance from the model.
08:30
To configure this point in space, under Source Location, in the X Distance field, enter 100.
08:39
In the Y Distance field, enter 50.
08:43
In the Z Distance field, enter 50.
08:47
An example of a remote force is determining the load on a mast when its sail is being pushed by the wind.
08:55
Enter any Force value, and then click OK.
08:59
The Remote Force load displays in the canvas.
09:03
Open the Structural Loads dialog again and change the Type to Hydrostatic Pressure.
09:10
A hydrostatic pressure load applies a linearly varying pressure to a face.
09:16
An Info dialog displays, indicating that gravity must be on to apply a hydrostatic pressure load, so it will be turned on automatically.
09:27
Click OK.
09:29
In the canvas, select the side face of the model.
09:34
Hydrostatic pressure applies to situations where pressure increases based on the depth of the model in fluid.
09:42
In the dialog, next to Select Surface Point, click the selection tool,
09:48
and then select the upper-left vertex of the selected face.
09:54
Click OK.
09:57
Gravity can be applied as a global load to a study.
10:00
From the Browser, under Study 1—Static Stress, expand Load Case1, and then expand Loads..
10:10
Keep in mind that Gravity affects masses, including applied point masses.
10:17
Since accurate simulation results rely on the replication of real-world properties and forces,
10:24
it is important to understand how materials, constraints, and loads work when setting up a simulation study.
10:33
When you have finished configuring the materials, constraints, and loads for your model, be sure to save the file.
Step-by-step guide
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