Description of Fatigue Crack Propagation under Mixed-Mode II+III in Terms of J-Integral

Jana Horníková; Pavel Šandera; Tomáš Vojtek; Jaroslav Pokluda

doi:10.4028/www.scientific.net/KEM.627.145

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 627Description of Fatigue Crack Propagation under...

Description of Fatigue Crack Propagation under Mixed-Mode II+III in Terms of J-Integral

Abstract:

The paper is dedicated to experiments on near-threshold fatigue cracks under mixed-mode II+III in the ARMCO iron. The mixed mode crack growth was described using an equivalent factor ΔJeff,eq=(1-α)ΔJeff,eqII+αΔJeff,eqIII. The most appropriate description was found for α = 0.67 indicating that the mode III component should be more efficient than that of the mode II which is in contradiction of a ΔK_eq–based analysis. This result shows that, unlike in the austenitic steel, the difference in the efficiency of modes II and III in the ARMCO iron is very small.

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Periodical:

Key Engineering Materials (Volume 627)

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145-148

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https://doi.org/10.4028/www.scientific.net/KEM.627.145

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Online since:

September 2014

Authors:

Jana Horníková*, Pavel Šandera, Tomáš Vojtek, Jaroslav Pokluda

Keywords:

Armco Iron, Crack Growth, J-Integral Range, Mixed Mode

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