EFFECT OF CRACK SIZE ON ACOUSTIC EMISSION DURING MECHANICAL TESTING.
Abstract
The paper reports on an investigation in which acoustic emission parameters are presented as a function of the crack size and the extent of loading to fracture. These parameters include the cumulative count, the energy of the acoustic signal expressed in terms of the root mean square of the amplitude and the waveform characteristics, such as the amplitude and pulse width distribution. The objective is to determine the acoustic emission characteristics of a material prior to fracture. Two types of steel were used in the study.