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J-integral range to characterize fatigue crack growth rate in notched specimens

Rozumek D., Lazzarin P., Macha E., Meneghetti G.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

2005

z. 82

179-186

The paper deals with fatigue crack propagation from notches in plates made of FeP04 steel and AA 356-T6 aluminium alloy. The tests were performed under different stress ranges by keeping constant the nominal load ratio (R=0.1). The specimens were weakened by nearly-sharp and blunt two-sided notches. The results of the fatigue tests are reanalysed here in terms of J-integral range including the notch influence. It was observed that the blunter notches are, the higher fatigue crack growth rate is.