PSI - Issue 39

D. Fedotova et al. / Procedia Structural Integrity 39 (2022) 419–431 Author name / Structural Integrity Procedia 00 (2019) 000–000

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Differences in the behavior of plastic HRR SIFs and new plastic SGP SIFs in normalized coordinates are most clearly seen. The upper row shows the mode I dependencies between the normalized classic HRR SIFs and new plastic SIFs SGP and dimensionless crack length Σ a/w , while the bottom row corresponds to the behavior of these parameters under the mixed mode state normalized by the pure mode II initial crack tip state. Mode I Mixed Modes a b l=1µm l=1µm

d

c

l=5µm

l=5µm

e

f

l=10µm

l=10µm

Fig. 6. Dimensionless (a, b) elastic, (c, d) classical plastic stress intensity factors and (e, f) new plastic stress intensity factors SGP.