Corrosion Monitoring Method of Porous Aluminum Alloy Plate Hole Edges Based on Piezoelectric Sensors

Abstract

Corrosion damage to the aircraft structure can significantly reduce the safety performance and endanger flight safety. Especially when the corrosion occurs in a stress concentration region, such as hole edges, it can easily threaten the entire structure. In this paper, an on-line imaging qualitative monitoring algorithm based on piezoelectric sensors is proposed for detecting hole edge corrosion damage of porous aluminum alloy structures. The normalized amplitude is used to characterize the correlation between the initial Lamb wave signal and the damage signal, which is as an image reconstruction parameter in the algebraic iterative probability reconstruction algorithm. Moreover, a homogenization algorithm is proposed to process the reconstruction results. The experimental results of single hole and double hole corrosion for porous aluminum alloy plate show that the method can effectively achieve the location and quantification of corrosion damage to one and two holes of the porous structure.

The on-Line Monitoring Analysis of Electromechanical Equipment Under Embedded Sensor

“…Embedded hardware and software that can design complex functions and make them tightly coupled together [13].…”

Application of PZT Ceramic Sensors for Composite Structure Monitoring Using Harmonic Excitation Signals and Bayesian Classification Approach

“…Elastic waves can interact with structure discontinuities caused by different kinds of damage enabling successful PZT use for Structural Health Monitoring. There exists a vast literature on the subject, providing numerous examples of PZT application [ 11 ], in particular to: cracks detection and their growth monitoring [ 12 , 13 , 14 ]; bolt and rivet joints monitoring [ 15 , 16 , 17 , 18 , 19 ]; corrosion detection [ 20 , 21 , 22 ]; concrete structures and soil properties monitoring [ 23 , 24 , 25 , 26 ]; pipeline damage detection [ 27 , 28 ]; large structure monitoring [ 29 , 30 , 31 , 32 ]; malignant tumor detection [ 33 ]; other applications [ 34 , 35 ]. …”

“…• bolt and rivet joints monitoring [15][16][17][18][19]; • corrosion detection [20][21][22]; • concrete structures and soil properties monitoring [23][24][25][26]; • pipeline damage detection [27,28]; • large structure monitoring [29][30][31][32]; • malignant tumor detection [33]; • other applications [34,35].…”

Hole-Edge Corrosion Expansion Monitoring Based on Lamb Wave

“…Giurgiutiu et al proposed the damage index (DI) based on root mean square value and Cohen type excitation cross time-frequency analysis, in order to quantitatively evaluate the corrosion damage of internal and external surfaces and the structural thickness loss [23]. However, there are few reports on monitoring the corrosion of rivet hole structure [24]. Rivet holes in aircraft aluminum alloy may be corroded by air or other factors; therefore, it is necessary to investigate the corrosion damage around rivet holes.…”