PSI - Issue 5

Stanislav SEITL et al. / Procedia Structural Integrity 5 (2017) 697–704 Seitl, S. et l./ Structur Integrity Procedia 00 (2017) 000 – 0 0

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Fig. 3 Comparison of calibration curves for a short edge crack loaded by tension with and without a hole, the hole edge starts at the distance a/W =0.13 (the EN 1993-1-8 Eurocode 3: 2006)

Fig. 4 Comparison of calibration curves for a short edge crack loaded by tension with and without a hole, the hole starts at the distance a/W =0.17 (Correia et al. 2017)

4.2. Bending load

Figs. 5 and 6 compare the obtained calibration curves from FEM for various load types: pure, three and four point bending for edge cracks propagation in a specimen with a hole and without a hole, the hole edge starts at a/W =0.13 and 0.17, respectively. The curves used for the plate without a hole have a lower slope than for the plate with a hole. The types of bending loads are not negligible either, that can be seen in Figs 5 and 6, where the difference increases in comparison for the plate without a hole. The calibration curves can be given by the following polynomial functions: for a hole edge in a/W =0.13 ( / ) = 1.1963 − 16.195( / ) + 847.57( / ) 2 − 11555( / ) 3 + 54644( / ) 4 (8) ( / ) 3 / =4 = 1.0622 − 14.373( / ) + 753.35( / ) 2 − 10274( / ) 3 + 48598( / ) 4 (9)