Published: Jan 1990
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The calibration of impact test machines is done by two methods. A direct method which consists to verify and control the dimensions of the machines; an indirect method which consists to compare the results of a test done with reference test pieces, between a reference machine and a machine which is to verify. The values of the geometrical parameters of the machines, have an influence on the results of a test. The present work quantifies the parameters variations and compares the results obtained with bending specimens and with charpy specimens. As a matter of fact, the influence of the dimensional parameters of machines can be finally expressed in different values of energy obtained with the test pieces, and allow the comparison of different types of specimens. The choice of reference specimen is now done by ISO and by ECISS. This present work has brought some constructive element before the choice.
impact test, charpy machine, resilience, bending, anvils
Chief, Laboratoire National D'Essais, Trappes,