Issue 35

Y. Matsuda et alii, Frattura ed Integrità Strutturale, 35 (2016) 1-10; DOI: 10.3221/IGF-ESIS.35.01 7 (a) Virgin materials (b) Torsional prestrained materials Figure 8 : Relations between fatigue crack growth rate and stress intensity factor range in S25C steel.  pre : Specific angle of twist. Figure 9 : Relation between fatigue crack growth acceleration rate in the presence of hydrogen and hydrogen content.  pre : Specific angle of twist. * The dotted line shows 30 times acceleration of fatigue crack growth rate for hydrogen-precharged specimen than the uncharged specimen.