Updatecomplete optimisation pending
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Goal of this tutorial
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Next some help geometries are created that will be subtracted from the initial Design Space. For these steps the Design Space is hidden.
Non-Design Spaces are created where the exact Geometry after the optimisation is needed.
With the Offset-Method of the Non-Design Spaces Tool the six Non-Design Spaces are chosen as shown in the picture (offset of 2 mm).
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At first we need to define regions where accessibility is needed
Therefore we use the split tool with the offset function and an offset of 3 mm.
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After this the Access Regions based on the Non-Design Spaces cells can be created.
Therefore, the Access Region Tool in the Optimisation Tools is activated.
A sufficient extrude Distance is entered and the face of the Non-Design Space ofthe created cells is chosen to create the according Access Region.
It’s recommended to choose a scaling factor for the Access Regions to have a little bit extra space for the assembly work later on (like 1.1).
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With the same technique all Access Regions can be created. The result looks like the picture below.
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Next the Clearance Region for the Sensor and the force input and the Access Region for the Sensor are defined.
For the Sensor the Clearance Region Tool is used with an offset of 0.2 mm. All faces except the one that faces towards the attachment point is chosen.
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To create the Access Region the Access Region Tool is used again - only this time the “cross section” method.
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Tip: To have an easier access to the Non-Design Spaces choose the picking Filter “Cells” and hide the Design Space Cell so that only the Non-Design Spaces are visible. Simply choose a whole Non-Design Space by drawing a rectangle like shown in the picture below.
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Definition of Machining Allowances
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Machining Allowances should be applied to every functional surface. Adjacent Faces should be selected at once, to create one continuous geometry. Therefore, the automatic execution mode can be turned off.
Interfaces
Next the Interfaces are created where the exact Geometry after the optimisation is needed.
The Interfaces are chosen as shown in the picture with a thickness of 3 mm, a machining offset of 1 mm and an offset distance of 2 mm.
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Now your Assembly should look like this.
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Design Space
Non-Design
Retained Volumes
Excluded Volumes
Access Region
Clearance Region
Machining AllowanceInterfaces
Design Space
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Non-Design Spaces
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Retained Volumes
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Excluded Volumes
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Note: The prior defined Clearance Regions are automatically defined after you choose the corresponding Retained and Excluded Volumes.
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Machining Allowance
Note: The prior defined Machining Allowances are automatically defined after you choose the corresponding Non-Design Spaces.
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Interfaces
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Click Create Configuration and a GD Configuration will be created.
Click Apply Configuration and the tool executes all necessary Boolean Operations.
The final Design Space is created.
For the next steps hide all the other Parts of the Assembly except for the Design Space. You should also hide the Machining Allowances of the active Design Space to have better access to apply the loads & boundary conditions.
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You can see the included parts of the GD Configuration by double clicking the GD Configuration in the Model Browser.
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To get an overview of the GD Configuration right click on this and choose Edit. A window opens where you can see the chosen geometries included in the configuration.
You can also change your configuration here and apply it again to create a new Design Space with updated geometries.
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Create the material in the Materials editor and assign it to the Design Spaceand Retained Volume. It is possible to create a separate material for the Retained Volume. In this case the material behaviour is Isotropic.
The specific values needed are the Young's Modulus (72000 MPa), Poisson ratio (0.34) and Density (2.7e-6 kg/mm3).
The Tension Strength is the maximum allowable stress for the material and is set to 460 MPa.
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In this case four forces and one moment are defined. The first two are applied on the retained volume and the last three on the Non-Design Space that is connected faces of the interface that represents the connection to the sensor. Ensure to display the Design Space Solid to be able to apply Boundary Conditions.
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Three constraints are created and attached on the Non-Design SpacesInterfaces on the lower side:
Name | Direction |
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Constraint 1 | x, y, z (=0) |
Constraint 2 | x, y, z (=0) |
Constraint 3 | x, y, z (=0) |
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