试验温度/℃

应力比

b

$b\ln \left(N_a-N_0\right)$

$R^2$

10

0.6

1.089

7.031

0.9923

0.5

1.082

7.907

0.9823

0.4

0.915

7.942

0.9750

0.3

0.852

9.399

0.9859

20

0.6

0.885

6.891

0.9889

0.5

0.688

5.904

0.9661

0.4

0.746

6.930

0.9924

0.3

0.893

9.892

0.9574

30

0.6

1.917

10.337

0.9365

0.5

1.277

8.389

0.9881

0.4

1.431

10.971

0.9854

0.3

0.725

6.153

0.9864