Uncertainty analysis in the notch impact test, for materials with different energy levels

Abstract

The notch impact test, that is used to determine the amount of absorbed energy consumed, for breaking materials, under dynamic forces, is among the various important material mechanical tests. The quality and reliability of the results obtained, as a result of the test, are of great value for laboratories. In this study, the parameters affecting the measurement quality in the notch impact test, are expressed as uncertainty values. Charpy notch impact test was performed for materials with different absorbed energy levels in the laboratory. The uncertainty values were calculated, according to the ISO 148-1 standard, from the data obtained. Then, the uncertainty values were analyzed and their effects on the uncertainty calculation were determined. Herein, it was concluded that the parameters should be determined and analyzed correctly, in order to minimize measurement uncertainties.