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- W2047197398 abstract "Abstract The purpose of the present study was to compare statistically some different methods for the evaluation of fracture toughness of the nuclear reactor material A-533 B. Since linear elastic fracture mechanics is not applicable to this material at the interesting temperatures (275°C), the so-calledJIc testing method was employed. Two main difficulties are inherent in this type of testing. The first one is to determine the quantity J as a function of the deflection of the three-point bend specimens used. Three different techniques were used, the first two based on the experimentally observed input of energy to the specimen and the third employing finite element calculations. The second main problem is to determine the point when crack growth begins. For this, two methods were used, a direct electrical method and the indirect R-curve method. A total of forty specimens were tested at two laboratories. No statistically significant different results were obtained from the respective laboratories. The three methods of calculating J yielded somewhat different results, although the discrepancy was small. Also the two methods of determination of the growth initiation point yielded consistent results. The R-curve method, however, exhibited a larger uncertainty as measured by the standard deviation. The resulting JIc value also agreed well with earlier presented results. The relative standard deviation was of the order of 25%, which is quite small for this type of experiment." @default.
- W2047197398 created "2016-06-24" @default.
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- W2047197398 date "1978-01-01" @default.
- W2047197398 modified "2023-10-01" @default.
- W2047197398 title "JIC-testing of A-533 B— statistical evaluation of some different testing techniques" @default.
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- W2047197398 doi "https://doi.org/10.1016/0013-7944(78)90006-1" @default.
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