Pressure Load

In this Task 

A pressure load will be applied to the top face of a cylinder to create a domed surface.

The Isolate feature will be used to display a single part.

Associated Tasks 

Relocating the Workplane.

Using the Simple Extrude tool.

Take Note 

View is set to any Front; Workplane is displayed.

Model is displayed in Wireframe.

The Globe layer is switched back on.

Pressure Load

Ribbon : Modify | Facet Options | Pressure Load

Default Menu : Modify | Modify 3D Objects | Facet Editing | Pressure Load

Palette : 3D Model | Boolean & Facet | Pressure Load

The facet of a solid can be modified by applying a uniform pressure load to the surface of a solid. This is referred to as Deformable Modeling.

Set the view to Front.

Use Workplane Origin to place the Workplane origin in a position similar to that shown below.

Front view showing new position of Workplane

Make sure the Workplane is just above the dome of the sphere.

Turn the view to World Plan and display the model without the Form Building Edges. Use Options > Display to do this. This allows the edges of the model to be viewed more clearly, without the display of the surface lines.

Isolate the top extrusion, shown below. Select the part, then use Edit | Isolate Objects to do this.

Isolating the top extrusion

Using the Lens layer, draw a new Double Point Circle on the Workplane, using the vertex points at the inner edge of the extrusion, shown in bold below.

Take Note 

Remember to view the model in Wireframe mode to view the newly drawn circle.

  Simple Extrude

Ribbon : Draw | Draw 3D | Simple Extrude

Default Menu : Draw | 3D Object | 3D Profile Based | Simple Extrude

Palette : 3D Model | 3D Object | Simple Extrude

This extrusion tool sweeps a 2D profile in a plane perpendicular to the workplane to create a 3D object.

 

Select the Simple Extrude tool from the menu options above, making sure the Compound Profile option is deactivated. Make sure the draft angle is set to 0º. Use either the Properties sheet or the Selection Info palette to do this.

Turn the view to Front, then extrude the circle profile upwards to a position just below the top edge of the hexagonal extrusion, shown below.  Make sure the new extrusion clears the top of the hemisphere, shown below.

Make sure this extrusion is on the Lens layer.

Turn the view to an isometric view and select the Pressure Load tool from the menu options above

Apply the following settings, then select the top face of the new extrusion, shown below : Stretch = 2 ; Bend = 2 ; Resolution = 50 ; Isolines = 150 ; Gain = 2500.

The result is shown below.

Take Note 

Remember to view the model from different viewpoints to check the accuracy of this task.

Isolate/Hide Objects

Ribbon : Edit | Object Options| Isolate/Hide Objects

Default Menu : Edit | Isolate Objects

This display tool allows objects which are drawn as specific parts to be temporarily isolated or hidden from view.This is effective when producing a design composed of several composite parts or complex shapes.When selecting the Isolate Objects option, only the selected object or group of objects is displayed in the editor, with all remaining objects being temporarily hidden. The End Isolation tool restores the display of all entities in the drawing.When selecting the Hide Objects option, the selected object or group of objects is temporarily hidden in the editor, with all remaining objects displayed.The Isolate/Hide Objects tool functions for both 2D profiles and 3D parts, and single or multiple objects can be selected to be Isolated or Hidden. Objects drawn on multiple layers can also be selected, provided such layers are not locked in the Design Director.The objects which are isolated in the editor appear in the Part Tree in the Selection Info palette and changes to the design can be done in context. When isolated features are modified in the Part Tree, the associated parts are displayed in context in the editor until the modification is complete. WhenWhen the End Isolation tool is selected, all previously isolated (displayed) or hidden objects are restored to the editor, irrespective of the current view.The Isolate/Hide Objects tool functions independently from layer control methods used in the Design Director.Objects can be selected using the Isolate/Hide Objects function in any view or display mode.

 

In the example below, the newly created lens will be isolated from the associated parts. Select the lens, shown below.

Selecting the lens for isolation in the editor

By selecting Edit | Isolate Objects, only the lens part remains in the editor, shown below.

Selected ‘lens’ part only viewed in the editor

The view can be changed and when End isolation is activated, the hidden parts are restored in alignment with the current view, shown below.

Isolated object, above left and hidden objects restored and aligned to the current view after ‘End Isolation’, above right 

Additional Resources

Navigate here for more information on using the Isolate/Hide object features.