ISSN:
1460-2695
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this paper, an assessment is made regarding the effects of J–R curve fitting and extrapolation methods in two J-integral criteria – namely crack initiation, Ji, and tearing instability, J50– which were obtained through the linear normalization technique. Power-law, logarithmic and linear fits were concurrently applied to J–Δa data derived from sub-sized compact tensile specimens machined from a nuclear grade steel and tested at 300 °C. Research results show that the logarithmic J–R fit is the most conservative approach within a broad range of elastic–plastic fracture resistance, compared to the conventional power-law fit. On the other hand, the linear fitting method provided the most non-conservative J-predictions. The values of Ji and J50 have been successfully correlated with the net energy absorbed during Charpy impact testing of the materials.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1046/j.1460-2695.2003.00597.x
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