Characteristics of laser ultrasound interaction with multi-layered dissimilar metals adhesive interface by numerical simulation

Zhang, Kuanshuang; Zhou, Zhenggan; Jing-lun, Zhou; Sun, Greg

doi:10.1016/j.apsusc.2015.06.103

Cited by 25 publications

(4 citation statements)

References 16 publications

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“…P X and P Y are the covariances of the X vector and Y vectors, respectively, P = PX+PY 2 . The formula for the Pearson correlation coefficient is shown in (12):…”

Section: Damage Imaging Based On Aadcmentioning

confidence: 99%

“…The commonly used nondestructive testing methods include eddy currents [4,5], magnetic powder [6], x-rays [7], liquid penetrants [8,9], and ultrasonic [10] methods. Among these, laser ultrasonic detection technology has become an attractive technology because of its non-contact nature, long working distance, and high detection accuracy, which have caused many researchers to pay attention to this method [11][12][13]. Zeng et al [14] used the amplitude of a longitudinalwave laser detection signal to judge the location and size of the damage.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Laser ultrasonic scanning for detection of damage in copper pipelines using blind compressive sensing and the adjacent area difference coefficient

Hong¹,

Huang²,

Liufu³

et al. 2022

Meas. Sci. Technol.

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Due to good thermal conductivity and corrosion resistance, copper has become common material for transmission pipeline. It is necessary to detect the early damage of copper pipeline effectively and quickly. Laser ultrasound scanning is non-contact and non-destructive damage identification method, which can realize high-precision, non-contact detection. At the same time, with the progress of internet technology, the traditional damage testing began to use advanced technologies such as internet of things and cloud computing to promote the upgrading of the testing industry from offline to online. However, obtaining large number wavefield vibration data is time consuming. In this paper, a laser ultrasonic scanning cloud platform damage detection method for copper pipeline based on alternating learning Blind Compressive Sensing (BCS) and Adjacent Area Difference Coefficient (AADC) is presented, which can improve the real-time performance and the detection accuracy. Firstly, the damage detection method is introduced in detail. BCS is used to compress the laser scanning signal at the data acquisition terminal, and then transmitted to data processing cloud platform for reconstruction. Taking the AADC value of each measuring point as the pixel value, the copper tube damage imaging is realized. Then, the simulated detection data of copper pipeline are obtained through the finite element model, and the weighted vector of AADC are determined by genetic algorithm. Finally, experimental are used to verify the effectiveness of this method, and the experimental results are analyzed and discussed. The AADC and other distance damage imaging methods are compared. The results show that this method can compress the wavefield data to 13% of the original data, and realize the damage detection.

show abstract

“…P X and P Y are the covariances of the X vector and Y vectors, respectively, P = PX+PY 2 . The formula for the Pearson correlation coefficient is shown in (12):…”

Section: Damage Imaging Based On Aadcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laser ultrasonic scanning for detection of damage in copper pipelines using blind compressive sensing and the adjacent area difference coefficient

Hong¹,

Huang²,

Liufu³

et al. 2022

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The adhesive structure should be initially detected after bonding two layers, and then inspected the adhesive interface after bonding one layer again. The earlier research mainly concentrated on investigating the characteristics of the adhesive interface of steel-epoxy resin using laser-generated body waves [6], but it did not characterize the complete adhesive interface. Generally, laser-generated longitudinal waves and shear waves with the thermoelastic regime can detect the adhesive interface of steel-epoxy resin or lead-epoxy resin, but it is unable to detect the entire coupled interface of a lead-steel adhesive structure owing to high reflection of ultrasonic energy in the adhesive interface.…”

Section: Introductionmentioning

confidence: 99%

Analysis of quantitative relationship between laser-generated guided waves and the adhesive interface by the numerical method

Zhang

Zhou

2017

Jnl of Sandwich Structures & Materials

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This research develops a guided wave technique to quantitatively characterize the adhesive interface properties of a nuclear radiation protection structure. The numerical model is established to investigate the propagation of laser-generated guided waves in a nuclear radiation protection structure that is composed of a 1045 steel sheet connected with a lead alloy (Pb-Sb-Sn) sheet by using an epoxy resin adhesive. The finite element method has been adopted to calculate the characteristics of laser-generated guided waves interaction with the adhesive interface. The propagation of structural guided waves in a single lead sheet and a multi-layered adhesive structure is analyzed and compared to explain the role of the adhesive layer. The investigation quantifies the influence of the relevant adhesive interface properties (bond thickness, Poisson’s ratio and Young’s modulus) on time- and frequency-domain characteristics of structural guided waves in the adhesive structure. The features of laser-generated guided waves interaction with interfacial defects are investigated to identify the discontinuity of the adhesive layer. The numerical results indicate that the characteristics of laser-generated guided waves would vary with different adhesive interface properties. Therefore, the research results would provide guidance for evaluating adhesive interface properties.

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“…Recently, the laser ultrasonic method has been investigated to detect the surface-breaking cracks and discontinuity of composite materials [3,11,12]. However, there are few researchers focusing on the detection of multilayered dissimilar metals bonding quality using laser ultrasonics [15]. On one hand, laser ultrasonic detection presents low sensitivity compared with the piezoelectric transducer.…”

Section: Introductionmentioning

confidence: 99%

Research on a laser ultrasound method for testing the quality of a nuclear radiation protection structure

Zhang

Zhou

2016

Meas. Sci. Technol.

Self Cite

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Laser ultrasonics has been investigated for inspecting the quality of a nuclear radiation protection structure. A possibility is proposed to improve the signal to noise ratio (SNR) of a laser ultrasonic inspection system. Then, a nuclear radiation protection structure composed of an AISI 1045 steel sheet connected with a lead alloy sheet by using an epoxy resin adhesive was manufactured with simulated defects. A non-contact laser ultrasonic inspection system, where the measured signals were filtered using a wavelet threshold de-noising method, was established to conduct a series of experiments. The proposed signal processing method can significantly improve the SNR of measured laser ultrasound signals on a rough solid surface. Compared with the SNR of original ultrasonic signals measured in transmission and reflection, the SNR of processed transmitted and reflected signals is improved by 13.8 and 16.6 dB, respectively. Moreover, laser ultrasonic C-scans based on the transmission and pulse-echo method can detect the simulated de-bonding defects, and the relative deviation between the measured sizes and design values is below 9%. Therefore, the laser ultrasonic method combined with effective signal processing can achieve the quantitative characterization of de-bonding defects in nuclear radiation protection structures.

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Characteristics of laser ultrasound interaction with multi-layered dissimilar metals adhesive interface by numerical simulation

Cited by 25 publications

References 16 publications

Laser ultrasonic scanning for detection of damage in copper pipelines using blind compressive sensing and the adjacent area difference coefficient

Laser ultrasonic scanning for detection of damage in copper pipelines using blind compressive sensing and the adjacent area difference coefficient

Analysis of quantitative relationship between laser-generated guided waves and the adhesive interface by the numerical method

Research on a laser ultrasound method for testing the quality of a nuclear radiation protection structure

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