Numerical investigation of the interaction of highly nonlinear solitary waves with corroded steel plates

Remote wireless monitoring of localized corrosion using compact solitary waves

“…Overall, the results are consistent with what observed in Figure 9, that is, that the onset and progression of corrosion affect the amplitude ratio, confirming that the method is effective at detecting local defects and that the wireless transducers are as effective as their wired counterparts. In addition, the results show that in P2 and W2 the amplitude ratio decreased after 70 h and then increased nearly after 250 h. The nonmonotonic trend observed for P2 and W2 agrees with the numerical predictions, reported by the Jalali and Rizzo, 51 in which the same features responded non-monotonically as a localized corrosion defect penetrates in a 4.8-mm plate. The numerical results show that the amplitude ratio increases as the plate thickness becomes smaller than 1.3 mm.…”

“…The non-monotonic trend of the normalized amplitude is attributed to the constructive interference between the motion of the plate–particle interface and the presence of strong flexural guided waves. The numerical results presented in the study by Jalali and Rizzo 51 also demonstrated that the length of the array of particles and the position of the sensor disk do not affect the properties of the reflected solitary waves significantly. As such, the use of a long array may be advisable to keep the sensor disk away from objects to be monitored at high temperature.…”

“…Four wired transducers were used to detect the impurity created by the presence of the magnet. The goal of this experiment was to experimentally validate the numerical findings presented in the study by Jalali and Rizzo 51 and at empirically determine the region of influence of the proposed setup. In the second experiment, the same steel plate was subjected to accelerated localized corrosion.…”

“…The above principles represent the foundation of the application of solitary wave for NDE and SHM applications. To this end, the use of highly nonlinear solitary waves (HNSWs) has been proved effective at identifying the mechanical properties of linear elastic media, 30,33,38 composites, 39–41 and geomaterials 42,43 ; measuring thickness 32,33,40 ; monitoring cement and concrete hydration 31,44,45 ; detecting defects in elastic solids and composites 46–52 ; assessing adhesive joints, 53 orthopedic and dental implants 54,55 and bone microstructure 56,57 ; inferring axial stress 33,58–60 ; and measuring intraocular pressure. 61…”

“…The above principles represent the foundation of the application of solitary wave for NDE and SHM applications. To this end, the use of highly nonlinear solitary waves (HNSWs) has been proved effective at identifying the mechanical properties of linear elastic media, 30,33,38 composites, [39][40][41] and geomaterials 42,43 ; measuring thickness 32,33,40 ; monitoring cement and concrete hydration 31,44,45 ; detecting defects in elastic solids and composites [46][47][48][49][50][51][52] ; assessing adhesive joints, 53 orthopedic and dental implants 54,55 and bone microstructure 56,57 ; inferring axial stress 33,[58][59][60] ; and measuring intraocular pressure. 61 The study presented in this article investigated the application of HNSWs to monitor corrosion in metallic structures using wired transducers, designed and assembled by our research group in past studies, and novel wireless transducers recently designed and assembled in our laboratory.…”