PSI - Issue 24

Giovanni Zonfrillo et al. / Procedia Structural Integrity 24 (2019) 470–482 G. Zonfrillo and M.S. Gulino / Structural Integrity Procedia 00 (2019) 000–000

475

6

Fig. 4. Distribution of α among the sample materials (Zhang’s rule).

Fig. 5. Distribution of σ u / σ y and Ψ among the sample materials (Daunys’s rule).

is limited to predicting softening or hardening behaviour alone; the whole set of considered rules are characterized by limited predictive ability, with Manson’s rule being able to su ffi ciently limit the number of errors (38%). Overall, Manson’s rule is characterized by the greatest number of correct predictions (55%) and a minimum number of errors (21%).