<title>Acoustic emission testing on an F/A-18 E/F titanium bulkhead</title>

Prediction of fatigue crack growth in steel bridge components using acoustic emission

“…Nondestructive evaluation of the crack extension is desirable to provide decision making for informed bridge management. It has been shown in previous research that AE monitoring is able to nondestructively detect crack growth in metals [1][2][3][4][5][6][7] and can provide insight to assess the integrity of structures such as bridges and aircraft [8][9][10][11]. It has been reported that AE techniques are so sensitive that fatigue cracks can be detected successfully even though the crack length may be less than 10 µm [3,4].…”

“…However, the techniques used to minimize extraneous noise in laboratory testing may not be entirely applicable for AE bridgemonitoring because the crack location may be less predictable in the field. Waveform-based AE approaches [9,11,18,19] have therefore been proposed to interpret the signals. In the work described here, the characteristics of waveforms induced by crack growth and friction were investigated to separate AE caused by crack growth from that caused by extraneous noise.…”

Adaptation of PWAS transducers to acoustic emission sensors

“…Acoustic emission monitoring has shown to be able to detect crack growth behavior [2][3][4][5][6][7][8][9][10][11] and assess integrity of structures such as bridges and aircraft [12][13][14][15]. The method has the notable advantage that the precise location of cracking does not need to be known for evaluation purposes.…”

Acoustic Emission for Civil Structures

“…There is a growing need to evaluate fatigue damage and predict remaining fatigue life. AE techniques have been extensively used in nondestructive testing and structural health monitoring (Gong et al, 1992;Martin et al, 1995;Chen and Choi, 2004). In the nature of fatigue cracks, energy arising from plastic deformation and fracture events is transmitted as stress waves that can be detected by remote sensors.…”