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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Kinetics of fatigue crack growth in Eurofer 97 steel
 Kruml, Tomáš ; Hutař, Pavel ; Náhlík, Luboš ; Seitl, Stanislav ; Polák, Jaroslav
The fatigue crack growth rate in the Eurofer 97 steel was measured by two different methodologies. Small crack growth data were obtained using cylindrical specimens with a shallow notch. No artificial crack starters were used. The growth of semicircular cracks of length between 10 – 2000 m were measured in symmetrical tension-compression cycling with constant strain amplitude (R = -1). Long crack data were measured using standard CT specimen and ASTM methodology in stress control with R = 0.1. The growth of fatigue cracks with length in the range of 10 – 30 mm was determined. It is shown that the crack growth rate of both types of cracks are in a very good agreement if J-integral rep-resentation is used and reasonable assumptions of the crack closure effects are taken into account.
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