PSI - Issue 19

Fabian Becker et al. / Procedia Structural Integrity 19 (2019) 645–654 F. Becker et al. / Structural Integrity Procedia 00 (2019) 000–000

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Fig. 7. State of visible specimen surface on the tension side at 0.77 of normalized cycles to failure

Fig. 8. State of visible specimen surface on the tension side at 0.84 of normalized cycles to failure

behaviour during the fatigue test. For the highest applied equivalent bending strains, shear delaminations within the specimens are found, causing a rapid decrease in dynamic sti ff ness. This behaviour is attributed to the shear stresses near the clamping section caused by the higher sti ff ness of the clamping section.