PSI - Issue 16

Grzegorz Lesiuk et al. / Procedia Structural Integrity 16 (2019) 51–58 Grzegorz Lesiuk et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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Table 3. Low cycle fatigue properties of analysed materials, based on De Jesus et al. (2006), Rozumek and Macha (2006) material  f ’(MPa)  f ’( -) b(-) c(-) P355NL1 1005.5 0.368 -0.103 -0.548 18G2A 782.0 0.693 -0.118 -0.410

3. Fatigue Crack growth test results Fatigue crack growth experiments were performed under mode I and mixed mode (I+II, I+III) condition. For mode I, was adopted the experimental procedure described in ASTM E647 standard (2015). The scheme of the specimens and dimensions are presented in Fig. 3. Fatigue crack growth rate test stand is shown in Fig. 4.

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b

Fig. 3. Shape and dimensions for the specimens subjected to fatigue crack growth tests, (a) mode I and mixed mode I+II, (b) mixed mode I+III

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b

Fig. 4. Measurement stand of the fatigue crack growth rate; a) fixture for mixed mode (I+II) creation, b) MZGS100 machine for (I+III) test.