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Create the material in the Materials editor and assign it to the Design Space
Assuming the part should be printed with a Manufacturing Method like FFF, a Transversely Isotropic material is applied. The z-axis of the PCS is always the build direction ( * ) and differs from the two in-plane directions y and x. The values for the materials have to be entered accordingly. For the input the main axis (1-2-3) are used which are equal to (z-y-x).
The specific values needed are the Young's Modulus in build direction (E1) (1700 MPa) and in in-plane direction (E2) (1900 MPa), the Shear Modulus (G12) (730 MPa) and the Poisson ratio (0.3) for xy (NU23) and (0.39) for yz (NU12). The density is set to 0.9e-6 kg/mm3.
As the last input the material limits should be entered. Which of these are required depends on the optimisation intention and the chosen Failure Criterion. In this case we want to take advantage of the directional dependent material limits as well as different limits for tension and compression (directional dependent Tsai-Wu).
These values are optional, if a different Failure Criterion is selected, less material input is required
Axis | In-Plane | |
|---|---|---|
Tension Strength | 48 MPa | 62 MPa |
Compression Strength | 96 MPa | 124 MPa |
Shear Strength | 50 MPa | |
* The Build Direction will be adjusted later (Step 6)
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One direct load is created (Force - Moment 1) on the shown surface with the given value in the table.
Name | Force/Moment/Pressure/Gravity | Direction (depending on local coordinate system) | Value in N/Nmm |
|---|---|---|---|
Force - Moment 1 | Force on faces | y | -500 |
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One Constraint on the mounting holes inner surface is created:
Name | Direction |
|---|---|
Constraint 1 | x, y, z (=0) |
Therefore, the Loads & Boundary Condition Tool is needed.
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The whole MSC Apex Generative Design projects with all results for the different anisotropic behaviour settings can be downloaded here:
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File Name | Material Stiffness | Failure Criterion |
|---|---|---|
Hook_2022-4_Iso_vM.7z | Isotropic | von Mises |
Hook_2022-4_Iso_TR.7z | Isotropic | FFF Thumb Rule |
Hook_2022-4_TransIso_TH.7z | Transversely Isotopic | Directional Dependency (Tsai-Hill) |
Hook_2022-4_TranIso_TW.7z | Transversely Isotopic | Directional Dependency (Tsai-Wu) |
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In case of anisotropic material stiffness and the directional dependent Tsai-Wu transversely isotropic Failure Criterion with huge material property differences for the in-plane directions and the build direction, as well for the maximum allowable tensile and compression strength, the optimisation may not give stable results. How to handle this here. |
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