Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7196115 | Theoretical and Applied Fracture Mechanics | 2018 | 17 Pages |
Abstract
To understand the effect of temperature on the rate of fatigue crack growth in D16T and B95AT aluminum alloys, fatigue crack growth experiments using a constant load amplitude were carried out on hollow cylindrical specimens with induced external semi-elliptical surface cracks. The rates of fatigue crack growth in the specimens were determined as a function of temperature, ranging from low (â60â¯Â°C) to elevated (+250â¯Â°C), and were analyzed as a function of the elastic and plastic stress intensity factors (SIF). The process of numerical calculations includes the analysis of the elastic constraint parameters in the form of the non-singular T-stress and TZ -factor, as well as the elastic-plastic constraint parameters in the form of the local stress triaxiality h and In-factors for the various tested materials at the different tested temperatures. The interpretation of the fatigue crack growth data in terms of the plastic SIFs results in a single general curve with a small scatter band over a wide range of temperatures.
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Authors
V.N. Shlyannikov, R.R. Yarullin, I.S. Ishtyryakov,