Issue 57

A. Kusch et alii, Frattura ed Integrità Strutturale, 57 (2021) 331-349; DOI: 10.3221/IGF-ESIS.57.24

Figure 12: Average SED in function of the control radius (FEA under plane strain condition).

In general, what observed for plane strain condition holds true for plane stress, only with higher values of the average SED, as shown in Fig. 13. In this case, the crossing point for V90R0 specimens occurs near R 0 =0.025 mm. For both plane strain and plane stress conditions, V45R0 samples seem to be outliers with lower average strain energy density than the other specimens. For this series a crack was observed at the notch tip (Fig. 4a), which could be the cause for a premature failure. Modeling the crack is not possible because its dimension and shape are uncertain. These specimens are therefore excluded from the analysis.

Figure 13: Average SED in function of the control radius (FEA under plane stress condition).

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