Materials Science
Fatigue Life Simulator
Investigate fatigue behavior and crack nucleation in rotating components. Modulate strength, endurance, and alternating load amplitudes to simulate high-cycle failure modes.
Design Life
S-N Curve
Basquin Power Law
Specimen
R.R. Moore
Rotary Bending
Output
CSV
Export ready
Parameters
Material Preset
Animated cycle accumulation
Fatigue and Damage Equations
Basquin S-N Curve
S_f = a * N^b (for 10^3 < N < 10^6)
Alternating Stress Limit
σ_AR = σ_a / (1 - σ_m / Sut)
Damage Fraction (Miner's Rule)
D = n / N (Failure at D ≥ 1.0)
Endurance limit Se specifies stress below which fatigue failure is theoretically impossible.
Alternating stress of 500 MPa reaches failure at 72,627 cycles.
Interactive Rotating Bening Specimen
Fatigue Life (N)
72,627cycles
Damage Accumulation (D)
0.1377
Stress Ratio (σ_a / Se)
1.25
Simulation Status
Accumulating
Stress Amplitude vs. Fatigue Life (S-N Curve)
S-N Curve Profile Data
| Log10(Cycles) | Cycles (N) | Fatigue Limit (MPa) |
|---|---|---|
| 3.00 | 1,000 | 720.0 MPa |
| 3.40 | 2,512 | 665.7 MPa |
| 3.80 | 6,310 | 615.5 MPa |
| 4.20 | 15,849 | 569.1 MPa |
| 4.60 | 39,811 | 526.2 MPa |
| 5.00 | 1,00,000 | 486.6 MPa |
| 5.40 | 2,51,189 | 449.9 MPa |
| 5.80 | 6,30,957 | 416.0 MPa |
| 6.20 | 15,84,893 | 400.0 MPa |
| 6.60 | 39,81,072 | 400.0 MPa |
| 7.00 | 1,00,00,000 | 400.0 MPa |