FEM Simulation
Create a spreadsheet that will do the deflection calculations shown below. Then model the same setup in NX and use FEM to duplicate the results.
You will need to be familiar with the following terms:
- FEM/FEA
- Stresses and Strains
- Stress
- Strain
- Force
- Young’s Modulus
- Deflection
- Tetrahedron
- Area Moment of Inertia
You will need to be able to calculate moments of inertia and the deflection of a fixed cantilever.
Assemblies as Manufacturing Steps
The rotor is first cast, and then machined. The casting model represents the geometry that is produced from the casting operation. The casting data needs to be preserved and edited independent of the machined rotor data.
Workflow
- Create the casting as its own part file (this has been done for you).
- Create an assembly file that will be the machined part.
- Add the cast part to the machined part file.
- Use the Wave Geometry Linker to copy the cast part geometry into the assembly.
- Remove the parts to be machined from the linked body.
- You are essentially mimicking the actual processes.
- This has several advantages.
- Each manufacturing step is fully documented.
- Updates to the casting will propagate to the machined part.
- The casting will appear as a component in the bill of materials for the machined part.
Also, add a series of .18 diameter holes through the casting that do not intersect the internal fins. 4 holes per set, 10 sets equally spaced.
