Piezoelectric phased arrays (PA) are an attractive approach for damage detection in metallic plate structures due to their ability to steer and focus guided waves to accurately detect structural damage. In this paper, a PA is designed using lead magnesium niobate-lead titanate (PMN-PT) piezoelectric transducer elements. PMN-PT is a d36 piezoelectric that can generate symmetric (S), anti-symmetric (A), and planar shear (SH) Lamb waves in thin-walled structures. Unlike conventional phased arrays based on d31 piezoelectric transducers (e.g., lead zirconate titanate) that generate multiple mixed wave modes, a PMN-PT phased array with array elements collocated on both sides of the plate can selectively generate individual wave modes in the structure. Selected single mode simplifies the interpretation of received waveforms, which is promising for faster damage identification. After designing the PMN-PT phased array based on element collocation, experimental validation is performed with a 14-element phased array attached to a thin aluminum plate. Laboratory experiments are executed using a high-speed data acquisition system that can command the phased array elements in parallel while triggering a laser Doppler vibrometer that synchronously measures out-of-plane wave fields in the plate. The experiments validate the ability of the phased array to selectively generate, steer, and focus A0, S0, and SH0 wave modes to localize and characterize damage introduced in the plate. Numerical simulations by the local interaction simulation approach are adopted to complement the laboratory experiments and to explore cracks in the aluminum plate to illustrate the detection capability of the proposed approach.
ChangPCFlatauALiuS.Review paper: health monitoring of civil infrastructure. Struct Health Monit2003; 2: 257–267.
2.
BalageasDFritzenC-PGüemesA.Structural health monitoring. John Wiley & Sons, Vo. 90, 2010.
3.
FarrarCRWordenK.Structural health monitoring: a machine learning perspective. John Wiley & Sons, West Sussex, UK, 2012.
4.
LynchJP.An overview of wireless structural health monitoring for civil structures. Phil Trans Royal Soc A: Math Phys Eng Sci2007; 365: 345–372.
5.
GiurgiutiuV.Structural health monitoring: with piezoelectric wafer active sensors. Academic Press, 2007.
6.
OuJLiHStructural health monitoring in mainland China: review and future trends. Struct Health Monitoring2010; 9: 219–231.
7.
DoeblingSWFarrarCRPrimeMB, et al. Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics: a literature review. Shock Vibration Digest1996. https://doi.org/10.2172/249299
8.
FarrarCRWordenK.An introduction to structural health monitoring. Phil Trans R Soc London A: Math Phys Eng Sci2007; 365: 303–315.
9.
LynchJPLohKJ.A summary review of wireless sensors and sensor networks for structural health monitoring. Shock Vibration Digest2006; 38: 91–130.
10.
KesslerSS. Piezoelectric-based in-situ damage detection of composite materials for structural health monitoring systems. Thesis. Massachusetts Institute of Technology, 2002.
11.
SuZYeLLuY.Guided Lamb waves for identification of damage in composite structures: a review. J Sound Vibr2006; 295: 753–780.
12.
ChangFKMarkmillerJFYangJ, et al. Design of SHM-Embedded Structures for Space Operation Vehicles. Proceedings of the first NASA Vehicle Engineering Health Management, Napa Valley, CA, 2005.
13.
SohnHParkHWLawKH, et al. Damage detection in composite plates by using an enhanced time reversal method. J Aerospace Eng2007; 20: 141–151.
14.
LuYYeLSuZ, et al. Quantitative assessment of through-thickness crack size based on Lamb wave scattering in aluminium plates. NDT E Int2008; 41: 59–68.
15.
GraffKF.Wave motion in elastic solids. Courier Corporation, 2012.
16.
RoseJL.Ultrasonic waves in solid media. Cambridge University Press, New York, NY, 2004.
17.
WilcoxPDLoweMCawleyP.Mode and transducer selection for long range Lamb wave inspection. J Intell Mater Syst Struct2001; 12: 553–565.
18.
DrinkwaterBWWilcoxPD.Ultrasonic arrays for non-destructive evaluation: a review. NDT E Int2006; 39: 525–541.
19.
YuLGiurgiutiuVIn situ 2-D piezoelectric wafer active sensors arrays for guided wave damage detection. Ultrasonics2008; 48: 117–134.
20.
YuLGiurgiutiuV.In-situ optimized PWAS phased arrays for Lamb wave structural health monitoring. J Mech Mater Struct2007; 2: 459–487.
21.
SchmmerLWJr.Fundamentals of ultrasonic phased arrays. Modern Phys Lett B2008; 22: 917–921.
22.
HolmesCDrinkwaterBWWilcoxPD.Post-processing of the full matrix of ultrasonic transmit–receive array data for non-destructive evaluation. NDT E Int2005; 38: 701–711.
23.
ZhouWLiHYuanF-G.Guided wave generation, sensing and damage detection using in-plane shear piezoelectric wafers. Smart Mater Struct2013; 23: 1–10.
24.
ZhangSJiangWMeyerRJJr., et al. Measurements of face shear properties in relaxor-PbTiO3 single crystals. J Appl Phys2011; 110: 064106.
25.
KamalAGiurgiutiuV.Shear horizontal wave excitation and reception with shear horizontal piezoelectric wafer active sensor (SH-PWAS). Smart Mater Struct2014; 23: 085019.
26.
RibichiniRCeglaFNagyPB, et al. Study and comparison of different EMAT configurations for SH wave inspection. IEEE Trans Ultrasonics, Ferroelectrics Frequency Control2011; 58: 2571–2581.
27.
MiaoHHuanQWangQ, et al. A new omnidirectional shear horizontal wave transducer using face-shear (d24) piezoelectric ring array. Ultrasonics2017; 74: 167–173.
28.
ZhangXZhouWLiH, et al. Guided wave-based bend detection in pipes using in-plane shear piezoelectric wafers. NDT E Int2020; 116: 102312.
29.
MiaoHDongSLiFExcitation of fundamental shear horizontal wave by using face-shear (d36) piezoelectric ceramics. J Appl Phys2016; 119: 174101.
30.
ZhangHCesnikCES. A hybrid non-reflective boundary technique for efficient simulation of guided waves using local interaction simulation approach. In: SPIE smart structures and materials+ nondestructive evaluation and health monitoring, Las Vegas, NV, 2016, pp. 98050U.
31.
DiamantiKSoutisCHodgkinsonJ.Lamb waves for the non-destructive inspection of monolithic and sandwich composite beams. Compos Part A Appl Sci Manuf2005; 36: 189–195.
32.
RoseJLChoYAvioliMJ.Next generation guided wave health monitoring for long range inspection of pipes. J Loss Preven Process Ind2009; 22: 1010–1015.
33.
VienBMossSChiuW, et al. Measured Lamb wave radiation patterns from 〈011〉 Mn-PMN-PZT relax or ferroelectric disks on an isotropic plate. Appl Phys Lett2018; 113: 122902.
34.
SalasKICesnikCES. Design and characterization of the CLoVER transducer for structural health monitoring. In: Proc. SPIE, 2008, pp. 1–12.
35.
SalasKCesnikCES. Guided wave excitation by a CLoVER transducer for structural health monitoring: theory and experiments. Smart Mater Struct2009; 18: 5–31.
36.
MiaoHLiF.Realization of face-shear piezoelectric coefficient d36 in PZT ceramics via ferroelastic domain engineering. Appl Phys Lett2015; 107: 122902.
37.
WangWZhangHLynchJP, et al. Numerical and experimental simulation of linear shear piezoelectric phased arrays for structural health monitoring. In: Nondestructive characterization and monitoring of advanced materials, aerospace, and civil infrastructure 2017, Portland, OR, 2017, p. 1016912. SPIE.
38.
WangWZhouWWangP, et al. In-plane shear piezoelectric wafer active sensor phased arrays for structural health monitoring. In: SPIE Smart structures and materials+ nondestructive evaluation and health monitoring, Las Vegas, NV, 2016, pp. 98030H.
39.
WangWLynchJPLiH.Damage detection in metallic plates using d36 piezoelectric phased arrays. In: 8th European workshop on structural health monitoring (EWSHM 2016), Spain, Bilbao, 2016, vol. 9, p. 12.
40.
WangWYangYGeneration of selective single-mode guided waves by d36 type piezoelectric wafer. Appl Phys Lett2022; 120: 214101.
41.
SchmerrLW. Fundamentals of ultrasonic phased arrays. Springer International Publishing, Switzerland, 2014.
42.
WangWZhangHLynchJP, et al. Experimental and numerical validation of guided wave phased arrays integrated within standard data acquisition systems for structural health monitoring. Struct Control Health Monit2018; 25: e2171.
43.
GiurgiutiuVBaoJ.Embedded-ultrasonics structural radar for in situ structural health monitoring of thin-wall structures. Struct Health Monit2004; 3: 121–140.
44.
WangCHRoseJTChangF-K.A synthetic time-reversal imaging method for structural health monitoring. Smart Mater Struct2004; 13: 415.
45.
CassereauDFinkM. Time-reversal of ultrasonic fields. III. Theory of the closed time-reversal cavity. IEEE Trans Ultrasonics, Ferroelectrics Freq Control1992; 39: 579–592.
46.
FinkM.Time reversal of ultrasonic fields. I. Basic principles. IEEE Trans Ultrasonics Ferroelectrics Freq Control1992; 39: 555–566.
47.
DelsantoPSchechterRMignognaR.Connection machine simulation of ultrasonic wave propagation in materials III: the three-dimensional case. Wave Motion1997; 26: 329–339.
48.
AtallaNSgardF.Finite element and boundary methods in structural acoustics and vibration. CRC Press, Boca Raton, 2015.
49.
GopalakrishnanSChakrabortyAMahapatraDR.Spectral finite element method: wave propagation, diagnostics and control in anisotropic and inhomogeneous structures. Springer Science & Business Media, 2007.
50.
GaulLKöglMWagnerM.Boundary element methods for engineers and scientists: an introductory course with advanced topics. Springer Science & Business Media, 2013.
51.
NadellaKSCesnikCES. Numerical simulation of wave propagation in composite plates. In: SPIE smart structures and materials+nondestructive evaluation and health monitoring, San Diego, CA, 2012, pp. 83480L–83480L-12.
