Volume 26, Issue 4 (July 1998)
Dynamic Calibration of Impact Test Instruments
This paper proposes a new dynamic calibration procedure of the force measuring system used in instrumented impact test apparatus. The method involves calculation of the force calibration factor on the basis of energy values obtained executing the Charpy or Izod test for a pendulum device and on the basis of velocity measurements in a rebound test for the falling dart impact apparatus. The procedure is simple, quick, and has the advantage that calibration is performed under the same dynamic conditions as in a test itself. Moreover, it does not require any additional equipment other than that used for conventional impact test execution: an impact device, an instrumented tup, and a data acquisition system.