Issue 33

Y. Hos et alii, Frattura ed Integrità Strutturale, 33 (2015) 42-55; DOI: 10.3221/IGF-ESIS.33.06



1 M R   , steel S235.

M

Figure 13 : Cracks in the specimen R-003, pure torsion with

530Nm

and

max



1 M R   , steel S235.

Figure 14 : Crack growth curve of specimen R-003, pure torsion with max M

and

530Nm

Torsion in Nm



1 M R   , steel S235.

M

Figure 15 : Crack closure of specimen R-029, pure torsion with

530Nm

and

max



1 M R   ) the one pair of data points A and B

M

For the inspection of crack closure (specimen R-029,

and

530Nm

max

for each crack branch were taken into consideration, Fig. 15. The artificially highlighted crack branches show that the lengths of the cracks are different, with direct consequence on their displacements and individual stress intensity factors

48