Modelling of Guided Wave Propagation with Spectral Element: Application in Structural Engineering

Wang, Ying; Hao, Hong

doi:10.4028/www.scientific.net/amm.553.687

Cited by 35 publications

(23 citation statements)

References 17 publications

(38 reference statements)

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“…In other words, these two analyses (implicit–dynamic and explicit–dynamic) should be coupled to obtain acceptable results. By considering a cosimulation model, different solvers can be allowed to do the calculations for the piezoelectric transducers and the host structure . As a result, a standard–explicit cosimulation interface is defined for each transducer to link its elements to the plate elements, as shown in Figure .…”

Section: Finite Element Modelingmentioning

confidence: 99%

Optimal sensors layout design based on reference‐free damage localization with lamb wave propagation

Motamed

Abedian

Nasiri

2020

Struct Control Health Monit

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Summary This study presents a new approach for designing optimal sensors layout based on accuracy of defect mapping. It is obtained from combination of the reference‐free damage detection technique and the probability‐based diagnostic imaging method. Considering damage indices based on continuous wavelet transform of sensors signals, the core of this study involves with development of a database of continuous wavelet transform features of a crack. In fact, the database contains the data from 594 different states in crack positions, orientations, and the considered sensing path lengths. Eventually, this database is used for localization of damage by interpolating the stored data collected from the above mentioned 594 states of the crack. The verification tests of defect mapping interpolating the stored data show an excellent match with the finite element method crack positioning performed for three different crack conditions. To generalize the results, here, 134 sensor layouts are considered in each of which 121 crack positions are detected by the help of probability‐based diagnostic imaging method. Then to check upon the accuracy of the results, the distance between the real center of the crack and the detected crack position by the interpolation of the stored data is calculated. Finally, the optimal sensor layouts single out from among the 134 ones based on user‐defined accuracy in localizing damage on an arbitrary monitoring area and the number of sensors.

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Section: Finite Element Modelingmentioning

confidence: 99%

Optimal sensors layout design based on reference‐free damage localization with lamb wave propagation

Motamed

Abedian

Nasiri

2020

Struct Control Health Monit

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“…A detailed description of the acoustoelastic effect in solid was developed by Hughes and Kelly . According to the wave type, ultrasonic methods can be classified into the longitudinal wave method, the shear wave method, the surface wave method, the guided wave method, and other methods. The longitudinal critically refracted (Lcr) wave, which is generated by longitudinal wave mode conversion, can travel below the surface of a material with a penetration depth relating to the excitation frequency.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the L cr wave TOF and shear‐wave spectrum methods for the uniaxial absolute stress evaluation of steel members

Teng

et al. 2019

Struct Control Health Monit

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The absolute stress of steel members is a key parameter for determining the performance of steel structures. Compared with other nondestructive evaluation methods, ultrasonic methods, which correlate material stress with ultrasonic velocity, have received the greatest amount of research attention. In this study, we investigated the measurement of the absolute stress distribution of steel members using two ultrasonic methods: a longitudinal critically refracted (Lcr) wave method and a shear wave method. The Lcr wave is generated from the longitudinal wave mode conversion and exhibits the greatest sensitivity to stress. The shear waves are generated by the birefringence effect, and their synthesis signal spectrum exhibits a minimum that varies with stress. A comparison of the two absolute stress evaluation methods is performed. Specifically, four steel members with identical dimensions and materials are used to investigate the discreteness of the calibrated parameters. The uniaxial absolute stress distributions of two steel members with variable cross sections are measured using the two methods and verified using the traditional strain gauge method. The results show that the uniaxial stress distributions of the two steel members can be evaluated by both the Lcr wave time-of-flight method and the shear-wave spectrum method, although the latter is more accurate for the measurement of stress distribution. Furthermore, the measurement principles, parametric calibrations, sensitivity, accuracy, and repeatability of the two methods are compared, and their applicability is discussed. KEYWORDS acoustoelastic effect, birefringence effect, Lcr wave TOF method, nondestructive stress measurement, shear-wave spectrum method, steel members, uniaxial absolute stress

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“…Guided wave propagation and spectral element method were used to detect interfacial defects between the embedded steel rebar and a reinforced concrete structure [24]. In this technique, the spectral model was developed, and a numerical simulation was carried out which was verified using experimental measurements [25]. The lamb wave techniques described above to detect interfacial defects utilised embedded PZTs inside the structure which cannot be applied in an existing structure and requires special preparation of the structure.…”

Section: Introductionmentioning

confidence: 99%

Debonding detection in a carbon fibre reinforced concrete structure using guided waves

Giri

Kharkovsky

Zhu

et al. 2019

Smart Mater. Struct.

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Guided waves are conventionally used in different non-destructive testing applications because of their cost-effectiveness and light-weight transducers that are easy to incorporate into the structure. The non-destructive evaluation of interfacial defects such as debonding in the composite structure is critical for the safety and long-term use. This paper presents a guided wave technique to detect a variety of debondings in carbon fibre reinforced concrete structure.Five composite specimens were prepared with different debondings: lengthwise, widthwise and patch debonding at different positions of the specimen with respect to the transducers. The guided wave received by the signal at a perfect bonding is taken as a reference. This signal is compared with the received signal at the different debonding conditions. The quantification of the debonding was performed using three damage indices: correlation coefficient, change in P2P and root mean square deviation. The results confirmed that the damage indices correlate linearly with the extent of the debonding which can be used to predict the debond conditions. This method is effective in the non-destructive detection of interfacial defects in an existing structure without special preparation.

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Modelling of Guided Wave Propagation with Spectral Element: Application in Structural Engineering

Cited by 35 publications

References 17 publications

Optimal sensors layout design based on reference‐free damage localization with lamb wave propagation

Optimal sensors layout design based on reference‐free damage localization with lamb wave propagation

Comparison of the L cr wave TOF and shear‐wave spectrum methods for the uniaxial absolute stress evaluation of steel members

Debonding detection in a carbon fibre reinforced concrete structure using guided waves

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