The LCA
Fixtures
Virtual wall at spindle cap face to simulate the upright
Cylindrical radial fixture at upright section
Virtual wall where end of nut would be (M24 nut)
Loading
Fx
+ Fx acts on the inner face of the thread
-Fx is ignored
Fy & Fz:
Uses resultant force magnitude and direction on inner and outer hub sections
SET ALL FORCES TO “TOTAL” AND NOT “PER ITEM”
Loading Cases
CASE 1
Node | Fx | Fy | Fz | Fyz | Fyz angle (deg) |
|---|---|---|---|---|---|
Outer Hub to Spindle | 0 | -390.415332 | 0 | -390.415332 | -90 |
Inner Hub to Spindle | 0 | 2486.985332 | 0 | 2486.985332 | 90 |
CASE 2
Node | Fx | Fy | Fz | Fyz | Fyz angle (deg) |
|---|---|---|---|---|---|
Outer Hub to Spindle | 0 | -8555.016 | -113.004 | 8555.762308 | 89.24321875 |
Inner Hub to Spindle | -1080.4 | 10715.816 | 1193.404 | 10782.065 | 83.64524308 |
CASE 3
Node | Fx | Fy | Fz | Fyz | Fyz angle (deg) |
|---|---|---|---|---|---|
Outer Hub to Spindle | 759.92 | 5451.294527 | -203.53533 | 5455.092909 | -87.86173709 |
Inner Hub to Spindle | 0 | -3931.44453 | 963.4553297 | 4047.777448 | -76.23024273 |
CASE 4
Node | Fx | Fy | Fz | Fyz | Fyz angle (deg) |
|---|---|---|---|---|---|
Outer Hub to Spindle | 0 | -10937.4204 | 369.9563703 | 10943.67547 | -88.06271868 |
Inner Hub to Spindle | -1381.27 | 13699.97036 | -1751.22637 | 13811.44387 | -82.71555523 |
CASE 5
Node | Fx | Fy | Fz | Fyz | Fyz angle (deg) |
|---|---|---|---|---|---|
Outer Hub to Spindle | 971.55 | 6969.427054 | 101.6188784 | 6970.16785 | 89.16464865 |
Inner Hub to Spindle | 0 | -5026.32705 | -1073.16888 | 5139.616237 | 77.94776765 |
Mesh
Max node size at 2mm
Mesh control the threaded face with 0.7mm max element size
Simulation Results
Any section in Red is greater than the Yield Strength (460 MPa)
The part will always be oriented to show the point of max stress
Case | Max Stress (MPa) | Model |
|---|---|---|
1 | 13.710 |  |
2 | 2,155.0 |  |
3 | 15,870.0 |  |
4 | 7,467.0 | 
|
5 | 19,510.0 |  |
(cases 2-5 had excessive displacement errors that I said no to. -MP)
Recommendations
The Spundle seemed to break right across the axis of symmetry, as shown below
Its possible that this is an issue with the simulation parameters rather than the part.