Issue 41

M. Vormwald et alii, Frattura ed Integrità Strutturale, 41 (2017) 314-322; DOI: 10.3221/IGF-ESIS.41.42 319 Figure 6: Crack tip parameters measured and calculated for specimen R-030, proportional tension and torsion loads. Figure 7: Crack tip parameters measured and calculated for specimen R-031, phase shift 90° between tension 33kN and torsion 382Nm loads. 0 20 40 60 80 100 2 4 6 8 10 [MPa√m] a*[mm] ΔK vs a*. R-030 ΔKI ΔKII ΔKIII ΔK S3D ΔK ES -50 -40 -30 -20 -10 0 3 4 5 6 7 8 9 10 θo [deg] a*[mm] θo vs a*. R-030 θo θo S3D θo ES -90 -80 -70 -60 -50 -40 -30 -20 -10 0 0,0 0,5 1,0 1,5 2,0 2 3 4 5 6 7 8 9 10 θo[deg] ΔKi/ΔK I a*[mm] ΔKi/ΔK I vs a* R-030 ΔKII/ΔKI ΔKIII/ΔKI θo -25 -15 -5 5 15 25 35 45 55 65 -25 -15 -5 5 15 25 35 45 55 65 K II K I K I vs K II [MPa√m]. R-030 7500 9200 9600 10800 12000 13500 14000 14250 0 20 40 60 80 100 120 2 4 6 8 10 12 14 16 18 20 [MPa√m] a*[mm] ΔK vs a*. R-031 ΔKI ΔKII ΔKIII ΔK S3D -70 -50 -30 -10 10 30 50 70 2 4 6 8 10 12 14 16 18 20 θo [deg] a*[mm] θo vs a*. R-031 θo θo S3D θo ES -90 -75 -60 -45 -30 -15 0 15 30 45 0,0 0,5 1,0 1,5 2,0 2 4 6 8 10 12 14 16 18 20 θo[deg] ΔKi/ΔK I a*[mm] ΔKi/ΔK I vs a* R-031 ΔKII/ΔKI ΔKIII/ΔKI θo -60 -40 -20 0 20 40 -60 -40 -20 0 20 40 K II K I K I vs K II [MPa√m]. R-031 32400 32000 31500 30500 30000 28000 23500