Reflections regarding uncertainty of measurement, on the results of a Nordic fatigue test interlaboratory comparison |
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Authors: | Magnus Holmgren Thomas Svensson Erland Johnson Klas Johansson |
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Institution: | (1) SP Swedish National Testing and Research Institute, Box 857, 501 15 Borås, Sweden;(2) Fraunhofer-Chalmers Research Centre for Industrial Mathematics, Box 857, 501 15 Borås, Sweden |
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Abstract: | This paper presents the experiences of calculation and reporting uncertainty of measurement in fatigue testing. Six Nordic laboratories performed fatigue tests on steel specimens. The laboratories also reported their results concerning uncertainty of measurement and how they calculated it. The results show large differences in the way the uncertainties of measurement were calculated and reported. No laboratory included the most significant uncertainty source, bending stress (due to misalignment of the testing machine, incorrect specimens and/or incorrectly mounted specimens), when calculating the uncertainty of measurement. Several laboratories did not calculate the uncertainty of measurement in accordance with the Guide to the Expression of Uncertainty in Measurement (GUM) 1]. |
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Keywords: | Uncertainty of measurement Calculation Report Fatigue test Laboratory intercomparison |
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