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LICENTIATE THESIS - Luleå tekniska universitet

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C = dε / dN [× 10 −6 ]<br />

100<br />

10<br />

1<br />

0.1<br />

0.01<br />

0.001<br />

0 0.2 0.4 0.6 0.8 1<br />

S max = σ max / f ct<br />

- 19 -<br />

utm_b2<br />

utm_b8<br />

utm_b9<br />

utm_b10<br />

Figure 20 Strain rate C versus the normalized higher stress level S max for series B.<br />

C = dε / dN [× 10 −6 ]<br />

100<br />

10<br />

1<br />

0.1<br />

0.01<br />

0.001<br />

0 0.2 0.4 0.6 0.8 1<br />

R = σ min / σ max<br />

utm_b2<br />

utm_b8<br />

utm_b9<br />

utm_b10<br />

Figure 21 Strain rate C versus the normalized stress amplitude R for series B.<br />

C = dε / dN [× 10 −6 ]<br />

100<br />

10<br />

1<br />

0.1<br />

0.01<br />

0.001<br />

1 10 100 1000 10000<br />

Number of load cycles during phase 2, dN<br />

utm_b2<br />

utm_b8<br />

utm_b9<br />

utm_b10<br />

Figure 22 Strain rate C versus the number of load cycles during phase 2, dN, for<br />

series B.

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