Table 1 Fatigue data of samples under two-level load.
From: Fatigue damage assessment of bogie frame based on an improved nonlinear cumulative damage model
Experimental samples | Loading condition (MPa) | Experimental data | Predicted cycle ratio | ||||
|---|---|---|---|---|---|---|---|
n1/Nf1 | n2/Nf2 | Miner | Error (%) | M–H model | Error (%) | ||
C45 | 331.46–284.4 | 0.0100 | 0.8474 | 0.9900 | 16.83% | 0.8401 | − 0.86% |
331.46–284.4 | 0.2500 | 0.5008 | 0.7500 | 49.76% | 0.4241 | − 15.31% | |
331.46–284.4 | 0.5000 | 0.3366 | 0.5000 | 48.54% | 0.2411 | − 28.36% | |
331.46–284.4 | 0.7500 | 0.1290 | 0.2500 | 93.80% | 0.1082 | − 16.11% | |
284.4–331.46 | 0.2500 | 0.7580 | 0.7500 | − 1.06% | 0.9693 | 27.87% | |
284.4–331.46 | 0.5000 | 0.7780 | 0.5000 | − 35.73% | 0.8247 | 6.00% | |
284.4–331.46 | 0.7500 | 0.8680 | 0.2500 | − 71.20% | 0.5145 | − 40.72% | |
16Mn | 562.9–392.3 | 0.0005 | 0.9352 | 0.9995 | 6.88% | 0.8998 | − 3.79% |
562.9–392.3 | 0.0504 | 0.7548 | 0.9496 | 25.81% | 0.5952 | − 21.15% | |
562.9–392.3 | 0.2520 | 0.7154 | 0.7480 | 4.56% | 0.6493 | − 9.24% | |
562.9–392.3 | 0.4284 | 0.6048 | 0.5716 | − 5.49% | 0.4751 | − 21.45% | |
562.9–392.3 | 0.6174 | 0.2910 | 0.3826 | 31.48% | 0.2588 | − 11.06% | |
372.62–392.3 | 0.2400 | 0.7980 | 0.7600 | − 4.76% | 0.7817 | − 2.05% | |
372.62–392.3 | 0.4330 | 0.7990 | 0.5670 | − 29.04% | 0.5904 | − 26.11% | |
