Experimental Analysis of Residual Stress and Bending Strength of Gear Tooth Surface after Shot Peening Treatment

Table 7

Distribution test results.

Lifetime distribution	Lifetime correlation coefficients (R) at different stress levels
	560.80	538.84	524.21	516.90
Lognormal distribution	0.9615	0.9634	0.9296	0.9667
Three-parameter weibull distribution	0.9886	0.9758	0.9725	0.9765