Links, Images, Project
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Goal of this tutorial
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Non-Design Spaces have to be selected using the optimisation Tools. In this case the four fixation points and two force application points are selected and a Non-Design Space with an offset of 3 mm is created for each.
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Machining Allowance should be applied to every functional surface. Thus, at the end two geometries are created: The Norm-Geometry and the Print-Geometry.
Even if this surface won’t be post processed in a precision machining process like milling, a Machining Allowance of 0 mm can be applied. This ensures sharp edges and planar surfaces after the intersection. Everytime when Maching Allowances are applied on all functional surfaces the automatic detection of Non-Design surfaces can be deactivated.
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Step 3: Definition of boundary conditions
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To apply the forces the Loads & Boundary Condition Tool is needed. Select cells Faces on the left side. By disabling the Thunderbolt (tool execution mode selector) on the top, both surfaces of the Non-Design Spaces can be selected simultaneously and a Remote Force between them can be applied. In the Orientation field an external (local) coordinate system can be selected (coordinate system 1).
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Name | Force/Moment/Pressure/Gravity | Direction (depending on local coordinate system) | Value |
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Force - Moment 1
| Force | Z (Local coordinate system 1)
| 35598,00 N |
Force - Moment 2 | Force | X (Local coordinate system 1) | 37823,00 N |
Force - Moment 43 | Moment | Z (Local coordinate system 1) | 565000 N mm |
Two loads and one Moment are created (Force - Moment 1 and Force - Moment 2) with the given values in the table in z- and x-direction which are applied on both Non-Design Spaces. The fourth condition (Force - Moment 4) is also attached on both Non-Design Spaces referring to coordinate system . They are all referring to the Local Coordinate System 1.
For Force - Moment 3 4 a second local coordinate system is needed. This one is rotated by 42 degrees for the z-axis (beta-angle). This can be done by adding 42° to the beta-angle after choosing the same plane as coordinate system 1.
Force - Moment 3 4 is also applied on the surfaces of both Non-Desing Spaces in z-direction. Now the orientation is referred to the coordinate system 2.
Name | Force/Moment/Pressure/Gravity | Direction (depending on local coordinate system) | Value |
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Force - Moment 34 | Force | Z (Local coordinate system 2) | -42273,00 N |
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All boundary conditions must be assigned to specific load cases, which are defined as Events. The number of Eventscan be changed by adding/deleting Eventsto the Meshless Generative Design GD Scenario. The assignment of the boundary conditions to the Events can be made in the Loads & Constrains Window. The already created loads and constraints that concern the Design Space are listed in this window and can be activated for each Eventindividually.
For each Force - Moment an Event is created including all four Constraintsthe Constraint:
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Step 5: Definition of optimisation parameters
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Select the Strut Density: Medium
Select the Shape Quality: Balanced
Set the Complexity Setting: 14
Enter the Stress Goal: 600 MPa
Don’t forget to save the project!
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Step 6: Starting the optimisation and visualize the results
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