Long-term stability of guided wave structural health monitoring using distributed adhesively bonded piezoelectric transducers

Attarian, V.; Cegla, Frederic; Cawley, P.

doi:10.1177/1475921714522842

Cited by 36 publications

(24 citation statements)

References 55 publications

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“…4, 5, 6, we overlapped the experimental time of flight with the dispersion curves formulated analytically [6]. [60,61]. The agreement between the experimental results and the theoretical dispersion curves is excellent.…”

Section: Pristine Plate: Pulse-echo and Pitch-catch Measurementsupporting

confidence: 54%

An integrated structural health monitoring system based on electromechanical impedance and guided ultrasonic waves

Gulizzi

Rizzo

Milazzo

et al. 2015

J Civil Struct Health Monit

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We propose a structural health monitoring (SHM) paradigm based on the simultaneous use of ultrasounds and electromechanical impedance (EMI) to monitor waveguides. Methods based on the propagation of guided ultrasonic waves (GUWs) are increasingly used in all those SHM applications that benefit from built-in transduction, moderately large inspection ranges, and high sensitivity to small flaws. Meantime, impedance-based SHM promises to adequately assess locally the structural integrity of simple waveguides and complex structures such as bolted connections. As both methods utilize piezoelectric transducers bonded or embedded to the structure of interest, this paper describes a unified SHM paradigm where pulse-echo and pitch-catch GUWs as well as EMI are employed simultaneously and are driven by the same sensing/hardware/software. We assess the feasibility of this unified system by monitoring a large flat aluminum plate with two transducers. Damage is simulated by adding small masses to the plate. The results demonstrate that the proposed system is robust and can be developed further to address the challenges associated with the SHM of complex structures

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Section: Pristine Plate: Pulse-echo and Pitch-catch Measurementsupporting

confidence: 54%

An integrated structural health monitoring system based on electromechanical impedance and guided ultrasonic waves

Gulizzi

Rizzo

Milazzo

et al. 2015

J Civil Struct Health Monit

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“…It was demonstrated that a simple subtraction of the actual and reference signals, i.e. the residual signal, can provide the required information needed for the damage detection and its evaluation [30], [31]. However, changing environmental and operational conditions [32], [33], such as temperature and stress, can mask the signal alterations caused by the damage [34].…”

Section: Structural Health Monitoring Using Guided Wavesmentioning

confidence: 99%

Finite element prediction of acoustoelastic effect associated with Lamb wave propagation in pre-stressed plates

Yang

Mohabuth

et al. 2019

Smart Mater. Struct.

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The paper presents outcomes of a finite element (FE) study of acoustoelastic effect associated with Lamb wave propagation in plates subjected to homogeneous bi-axial and bending stresses.In particular, the change of the phase velocity of the fundamental Lamb wave modes is obtained for different stress levels, bi-axial stress ratios and wave propagation angles. A comparison of the obtained numerical results with an analytical solution demonstrates a very good agreement.Moreover, the influence of bending stress on the wave velocities and wave front profile is further investigated numerically. There are currently no analytical results for this case. The developed and validated FE modelling approach can help to address several issues in the current non-destructive inspections including: in the investigation of changing stress conditions on the defect detection as well as in an adaptation of the existing Lamb wave-based defect evaluation systems to monitoring of stress too. The latter may have many benefits from sharing the same hardware for the purpose of maintaining structural integrity of thin-walled structural components. . Acoustoelastic effect of Lamb wave propagationAcoustoelastic effect is defined as the effect of the applied stress on the wave propagation in a media. It has been studied since the development of the finite deformation theory by Murnaghan [40], who formulated the material nonlinearity using third order elastic constants. Some pioneering studies in this area include the research of Hughes and Kelly [41], who derived equations relating the wave velocity to the applied stress and experimentally measured the acoustoelastic effect. Another experimental study of Egle and Bray [42] demonstrated how to obtain higher-order elastic constants from experiments with bulk waves. In the literature, many developments and studies in the acoustoelasticity mainly focused on and utilised bulk waves (Pau and Scalea [43]). The acoustoelastic effect is usually quantified = (20) So, equation (19), with the energy function presented in equation (16) can be translated to, ¬ = J -. © © = J -. © © © = J -. %)( ) % ©where T is the second Piola-Kirchhoff (PK2) stress. The stress in VUMAT must be updated with the equation at the end ( + ∆ ) of an integration step and stored in stressNew(i), based on the values of F and U given in the subroutine at the end of previous step ( ). Numerical Case Studies 3D Finite Element ModelA 3D FE model of a 6061-T6 aluminium plate was developed with ABAQUS software and the wave propagation problem was solved by the explicit integration approach [49]. The materialproperties of the 6061-T6 aluminium are listed in Table 1. The thickness of the plate is 3.2mm and the in-plane dimension is 240mm×240mm. The element type used in the model is the 8-

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“…Several promising systems have been demonstrated under laboratory conditions [3,4,5,6,7,8]. Researchers have investigated the effects of temperate [9,10,11,12,13], humidity [14] and vibration loading [15] on damage detection systems. The main focus of these works has been to assess environmental influences on pristine and damage propagation features.…”

Section: Introductionmentioning

confidence: 99%

Airborne Transducer Integrity under Operational Environment for Structural Health Monitoring

Salmanpour

Khodaei

Aliabadi

2016

Sensors

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This paper investigates the robustness of permanently mounted transducers used in airborne structural health monitoring systems, when exposed to the operational environment. Typical airliners operate in a range of conditions, hence, structural health monitoring (SHM) transducer robustness and integrity must be demonstrated for these environments. A set of extreme temperature, altitude and vibration environment test profiles are developed using the existing Radio Technical Commission for Aeronautics (RTCA)/DO-160 test methods. Commercially available transducers and manufactured versions bonded to carbon fibre reinforced polymer (CFRP) composite materials are tested. It was found that the DuraAct transducer is robust to environmental conditions tested, while the other transducer types degrade under the same conditions.

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Long-term stability of guided wave structural health monitoring using distributed adhesively bonded piezoelectric transducers

Cited by 36 publications

References 55 publications

An integrated structural health monitoring system based on electromechanical impedance and guided ultrasonic waves

An integrated structural health monitoring system based on electromechanical impedance and guided ultrasonic waves

Finite element prediction of acoustoelastic effect associated with Lamb wave propagation in pre-stressed plates

Airborne Transducer Integrity under Operational Environment for Structural Health Monitoring

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