Hub Nut FEA Report - 06/02/2023

i’m an idiot i should have done the maximum tensile case of bwd left acceleration. lmk if these sims look ok and i’ll come back to do that load case! @Jens Dekker

Fixtures

Fixed on hub nut’s inner threads

Loading

Applying only Fx loads to the contact face with the rim

Mesh Settings

Mesh settings:

Using curvature-based mesh
Applying mesh refinement to the flange edge

Using h-adaptive method with mesh coarsening enabled

Mesh Convergence

Material yield strength: 460 MPa

Fwd left acceleration

Maximum stress is like one high stress node on the edge between the flange and the nut boss
Nominal forces on the hub nut body appear to be converging to around 0.035 MPa, but then drops to 0.012 MPa at the smallest tested node size

Max Node Size (mm)	Mesh Picture	Max Stress (MPa)	Nominal Stress (MPa)	Location/Results

Max Node Size (mm)	Max Stress (MPa)	Nominal Stress (MPa)
5.63 2.67 (on flange edge)	7.146	0.02862
4.53 2.67 (on flange edge)	7.683	0.02972
3.57 2.67 (on flange edge)	11.15	0.03499
3.01 2.67 (on flange edge)	16.38	0.0352
2.57 1.66 (on flange edge)	54.57	0.01217

Bwd right acceleration

Nominal forces on the hub nut body appear to be converging-ish around 0.0125 MPa
- Max stress 29.47 MPa < 460 MPa → PASS

Max Node Size (mm)	Mesh Pictures, after h-adaptive refinement	Max Stress (MPa)	Nominal Stress (MPa)	Location/Results

Max Node Size (mm)	Max Stress (MPa)	Nominal Stress (MPa)
5.63 2.67 (on flange edge)	29.47	0.01277
4.53 2.67 (on flange edge)	31.84	0.02145
3.57 2.67 (on flange edge)	39.44	0.01507
3.01 2.67 (on flange edge)	42.42	0.01049