PSI - Issue 28

11

Author name / Structural Integrity Procedia 00 (2019) 000–000

Wim De Waele et al. / Procedia Structural Integrity 28 (2020) 253–265

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Figure 11: Evolution of experimentally determined fatigue crack growth for three load spectra of set 1 (highest number of repetitions). The peak and-valley and reduced peak-and-valley spectra allow to significantly reduce test duration whilst reaching a comparable final fatigue crack length.

Figure 12: Evolution of the experimentally determined fatigue crack growth during a load spectrum consisting of 20 repetitions of a rainflow counted load profile and comparison with numerical results obtained with the Paris equation not considering load interaction, and the modified Wheeler and generalized Willenborg models that take crack retardation into account.