Damage Factor Analysis of Q235A Steel Based on Acoustic Emission Test

To analyse the damage of Q235A steel during axial tension, tensile experiments were carried out on several Q235A sheet specimens, the acoustic emission (AE) signals were collected at the same time. The properties of cumulative ringing counts of sheet specimens were analysed during tension process, the load-cumulative ringing counts curves were fitted, and the expression of steel damage factor was obtained by polynomial cumulative ringing counts. The cumulative ringing counts calculated by this expression under different loads are close to the experimental values, which prove that it is feasible to use the cumulative ringing counts of acoustic emission to represent the damage factors of Q235A steel during tensile process.