Numerical and experimental research on damage shape recognition of aluminum alloy plate based on Lamb wave

Wu, Yaogang; Shen, Xing; Li, Dinghe

doi:10.1177/1045389x21990885

Cited by 5 publications

(6 citation statements)

References 28 publications

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“…In elastic solids, Lamb waves are excited in the form of elastic waves. The dispersion equation of Lamb waves is derived from elasticity [ 23 ].

where d denotes the thickness of the plate.…”

Section: Experiments and Simulationmentioning

confidence: 99%

“…In our previous research, the requirements for the convergence of mesh size and time increment steps were given [ 23 ]. The mesh size is affected by the group velocity of the S0 mode.…”

Section: Experiments and Simulationmentioning

confidence: 99%

“…De Fenza et al [ 22 ] proposed an astroid algorithm with the two-arrival-time difference method (2/ATDM). In our previous article, a damage shape recognition algorithm was proposed based on the 2/ATDM [ 23 ]. The layout and number of sensors have been studied by several scholars.…”

Section: Introductionmentioning

confidence: 99%

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Numerical and Experimental Research on Non-Reference Damage Localization Based on the Improved Two-Arrival-Time Difference Method

Liu

et al. 2022

Sensors

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The identification of damage based on Lamb waves can hardly avoid obtaining the reference signal under healthy conditions. A non-reference damage localization (NRDL) method is proposed in this paper. The NRDL method is established by the improved two-arrival-time difference method (2/ATDM) and BFGS method. The layout principles of the piezoelectric ceramic lead zirconate titanate (PZT) transducer array in the specimen are proposed. In contrast to existing methods, the damage outside the array in the specimen is identified based on the NRDL. The full-area damage location in the specimen is realized. Furthermore, the optimization of the excitation signal center frequency and transducer array layout is carried out. The damage location accuracy is greatly improved.

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“…In elastic solids, Lamb waves are excited in the form of elastic waves. The dispersion equation of Lamb waves is derived from elasticity [ 23 ].

where d denotes the thickness of the plate.…”

Section: Experiments and Simulationmentioning

confidence: 99%

“…In our previous research, the requirements for the convergence of mesh size and time increment steps were given [ 23 ]. The mesh size is affected by the group velocity of the S0 mode.…”

Section: Experiments and Simulationmentioning

confidence: 99%

See 1 more Smart Citation

Numerical and Experimental Research on Non-Reference Damage Localization Based on the Improved Two-Arrival-Time Difference Method

Liu

et al. 2022

Sensors

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“…The time of flight (ToF), which corresponds to the time taken by the wave packet to travel from an actuator to a sensor along a certain path, is a straightforward feature of the damage-scattered signal for damage localization. The ellipse and hyperbola algorithms become the two most important methods for locating defects based on the ToF in plate-like structures [ 5 , 6 , 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Baseline-Free Method for Damage Localization Using Guided Waves Based on Hyperbola Imaging Algorithm

Zhu

Qiu

et al. 2023

Sensors

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Most imaging methods based on ultrasonic Lamb waves in structural health monitoring requires reference signals, recorded in the intact state. This paper focuses on a novel baseline-free method for damage localization using Lamb waves based on a hyperbolic algorithm. This method employs a special array with a relatively small number of transducers and only one branch of the hyperbola. The novel symmetrical array was arranged on plate structures to eliminate the direct waves. The time difference between the received signals at symmetrical sensors was obtained from the damage-scattered waves. The sequence of time difference for constructing the hyperbolic trajectory was calculated by the cross-correlation method. Numerical simulation and experimental measurements were implemented on an aluminum plate with a through-thickness hole in the current state. The imaging results show that both the damages outside and inside the diamond-shaped arrays can be localized, and the positioning error reaches the maximum for the diamond-shaped array with the minimum size. The results indicate that the position of the through-hole in the aluminum plate can be identified and localized by the proposed baseline-free method.

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“…Therefore, it is necessary to investigate structural health monitoring (SHM) technologies for the TPS to detect the damage. For SHM applications, sensors are usually arranged in the TPS in advance and the signals can be used to analyze the health status of the structure (Lu et al, 2017; Wu et al, 2021). Le conducted experiments to detect damage in TPS by comparing the natural frequencies and damping ratios with those of healthy state (Le and Goo, 2020).…”

Section: Introductionmentioning

confidence: 99%

Multi-scale entropy based damage detection for thermal protection structures with variation of ambient temperature

Qian

Zhang

Tao

et al. 2022

Journal of Intelligent Material Systems and Structures

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The thermal protection structures of supersonic vehicles are vulnerable to damage in the extreme environment of high temperature. With advantages of the large propagation range and high sensitivity to damage, guided waves show great potential for structural health monitoring. However, guided waves are susceptible to ambient temperature change, resulting in low reliability of damage detection results. Therefore, this paper proposed a multi-scale entropy feature extraction method for structural damage detection. Firstly, to eliminate the influence of multi-mode guided waves, a sliding window was used to extract the wave packet of different signals to analyze disturbance caused by damage and temperature. Then, an ant colony optimization algorithm was introduced as a feature fusion method to improve the classification performance. To evaluate the performance of features selected by the ant colony optimization algorithm, K-means clustering algorithm, and silhouette coefficients were utilized to calculate the evaluation function and represent the characteristics of damage. Finally, a set of guided wave signals from 20°C to 40°C were obtained to investigate the influence of temperature variation on the damage feature extraction. The results show that the multi-scale entropy method based on the sliding window can effectively extract damage features in the condition of temperature change.

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Numerical and experimental research on damage shape recognition of aluminum alloy plate based on Lamb wave

Cited by 5 publications

References 28 publications

Numerical and Experimental Research on Non-Reference Damage Localization Based on the Improved Two-Arrival-Time Difference Method

Numerical and Experimental Research on Non-Reference Damage Localization Based on the Improved Two-Arrival-Time Difference Method

A Novel Baseline-Free Method for Damage Localization Using Guided Waves Based on Hyperbola Imaging Algorithm

Multi-scale entropy based damage detection for thermal protection structures with variation of ambient temperature

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