The fatigue crack growth characteristics of structural steel and weld connections are analyzed using quantitative acoustic emission\r\n(AE) technique. This was experimentally investigated by three-point bending testing of specimens under low cycle constant\r\namplitude loading using the wavelet packet analysis. The crack growth sequence, that is, initiation, crack propagation, and fracture,\r\nis extracted fromtheir corresponding frequency feature bands, respectively.The results obtained proved to be superior to qualitative\r\nAE analysis and the traditional linear elastic fracture mechanics for fatigue crack characterization in structural steel and welds.
Loading....