Analysis of acousto-ultrasonic characteristics for contact-type transducers coupled to composite laminated plates

Liu, T.; Kitipornchai, S.; Veidt, Martin

doi:10.1016/s0020-7403(00)00090-4

Cited by 9 publications

(5 citation statements)

References 14 publications

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“…Moreover, the contact transducers can be easily designed, configured or adjusted depending on the type of defects or damages and the availability of access region of the structure. Thus, the contact transducers are widely used in the various field of NDT such as the detection of flaws with straight beam test, inspection of delamination or disbonds in composites and many thickness gauging applications [ 10 , 11 , 12 , 13 ]. In this research work, the focus was kept on the contact-type ultrasonic transducers for the generation of GWs.…”

Section: Introductionmentioning

confidence: 99%

2D Analytical Model for the Directivity Prediction of Ultrasonic Contact Type Transducers in the Generation of Guided Waves

Tiwari

Raišutis

Mažeika

et al. 2018

Sensors

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In this paper, a novel 2D analytical model based on the Huygens’s principle of wave propagation is proposed in order to predict the directivity patterns of contact type ultrasonic transducers in the generation of guided waves (GWs). The developed model is able to estimate the directivity patterns at any distance, at any excitation frequency and for any configuration and shape of the transducers with prior information of phase dispersive characteristics of the guided wave modes and the behavior of transducer. This, in turn, facilitates to choose the appropriate transducer or arrays of transducers, suitable guided wave modes and excitation frequency for the nondestructive testing (NDT) and structural health monitoring (SHM) applications. The model is demonstrated for P1-type macro-fiber composite (MFC) transducer glued on a 2 mm thick aluminum (Al) alloy plate. The directivity patterns of MFC transducer in the generation of fundamental guided Lamb modes (the S0 and A0) and shear horizontal mode (the SH0) are successfully obtained at 80 kHz, 5-period excitation signal. The results are verified using 3D finite element (FE) modelling and experimental investigation. The results obtained using the proposed model shows the good agreement with those obtained using numerical simulations and experimental analysis. The calculation time using the analytical model was significantly shorter as compared to the time spent in experimental analysis and FE numerical modelling.

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Section: Introductionmentioning

confidence: 99%

2D Analytical Model for the Directivity Prediction of Ultrasonic Contact Type Transducers in the Generation of Guided Waves

Tiwari

Raišutis

Mažeika

et al. 2018

Sensors

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“…In AU procedure, the response of normal contact pressure sensed by the receiving transducer is obtained. Based on statistical analysis, numerical results are carried out to investigate influence of various parameters including simulating frequency, transducer modes, transducers location et al [7].…”

Section: Factors Influencing Swf Measurementmentioning

confidence: 99%

“…2 given as follows. As to transducers location optimal problem, several literatures [7,11] have reported. (…”

Section: Factors Influencing Swf Measurementmentioning

confidence: 99%

Factors Influencing Acousto-Ultrasonic Approach to Impact Damage in Composite Materials

Kong

Zhang

2011

AMR

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This paper studied factors influencing AU detection results on different damage specimens, including simulation frequency, transducer modes and transducer location. Correlation between acousto-ultrasonic parameters (AUP1, AUP2) and impact damage severity in composite was investigated. The results showed that as damage severity increased, AUP1 and AUP2 of three different transducers decreased. Applying low frequency transducer, the variation of AUP1 may indicate a more rapid detection prospect. In addition, applying S1-transducer and WD-transducer, AUP2 was more effective for the early damage detection. Varying transducer’s location, S1-transducer applying 500khz simulation frequency presented a valuable results.

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“…Many researchers experimentally reported the defect estimation of composite structures based on the UGW interaction [ 7 , 14 , 15 ]. Moreover, many studies have been conducted to understand the dispersive and multimodal behaviour of UGWs [ 16 , 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Defect Estimation Approach in Wind Turbine Blades Based on Phase Velocity Variation of Ultrasonic Guided Waves

Raišutis

Tiwari

Žukauskas

et al. 2021

Sensors

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The reliability of the wind turbine blade (WTB) evaluation using a new criterion is presented in the work. Variation of the ultrasonic guided waves (UGW) phase velocity is proposed to be used as a new criterion for defect detection. Based on an intermediate value between the maximum and minimum values, the calculation of the phase velocity threshold is used for defect detection, location and sizing. The operation of the proposed technique is verified using simulation and experimental studies. The artificially milled defect having a diameter of 81 mm on the segment of WTB is used for verification of the proposed technique. After the application of the proposed evaluation technique for analysis of the simulated B-scan image, the coordinates of defect edges have been estimated with relative errors of 3.7% and 3%, respectively. The size of the defect was estimated with a relative error of 2.7%. In the case of an experimentally measured B-scan image, the coordinates of defect edges have been estimated with relative errors of 12.5% and 3.9%, respectively. The size of the defect was estimated with a relative error of 10%. The comparative results obtained by modelling and experiment show the suitability of the proposed new criterion to be used for the defect detection tasks solving.

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Analysis of acousto-ultrasonic characteristics for contact-type transducers coupled to composite laminated plates

Cited by 9 publications

References 14 publications

2D Analytical Model for the Directivity Prediction of Ultrasonic Contact Type Transducers in the Generation of Guided Waves

2D Analytical Model for the Directivity Prediction of Ultrasonic Contact Type Transducers in the Generation of Guided Waves

Factors Influencing Acousto-Ultrasonic Approach to Impact Damage in Composite Materials

A Novel Defect Estimation Approach in Wind Turbine Blades Based on Phase Velocity Variation of Ultrasonic Guided Waves

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