A Modified Walker Model Dealing with Mean Stress Effect in Fatigue Life Prediction for Aeroengine Disks

Table 2

Statistical analysis for the prediction errors of different mean stress methods for all materials examined.

Material	T/°C	Goodman		Morrow		SWT		Walker		Modified Walker
		FGH4095	500	0.3230	0.3817	−0.4136	0.5109	0.1462	0.4195	0	0.3491	0	0.2552
600	0.3185		0.3557	−0.5253	0.6334	0.0603	0.4235	0	0.4008	0	0.2769
GH4169	500	1.0847	1.2153	−0.1752	0.7362	0.3505	0.7548	0	0.7093	0	0.6264
	650	1.3863	1.0668	−0.1981	0.8512	0.3472	0.8241	0	0.8177	0	0.5570
FGH4096	550	0.1990	0.2909	−0.2030	0.3114	0.1567	0.2915	0	0.2496	0	0.2275
TC11	300	0.6449	0.7774	−0.5057	0.7527	−0.0278	0.5372	0	0.5207	0	0.4510
35Cr2Ni4MoA	160	2.6252	2.7821	0.9583	0.9327	−0.0390	0.7505	0	0.6306	0	0.3567
2014-T6 Al	/	0.4311	0.5573	−0.5291	0.4601	0.0233	0.2884	0	0.2575	0	0.2212