Discrete element method modelling of elastic wave propagation in a meso-scale model of concrete
Ultrasonics. 2024 Apr 28;141:107336. doi: 10.1016/j.ultras.2024.107336. Online ahead of print.ABSTRACTThis paper deals with the accurate modelling of ultrasonic wave propagation in concrete at the mesoscopic level. This was achieved through the development of a discrete element method (DEM) model capable of simulating elastic wave signals comparable to those measured experimentally. The main objective of the work was to propose a novel methodology for constructing a meso-scale model of concrete dedicated to the analysis of elastic wave propagation. All the material parameters necessary to prepare a numerical DEM model of c...
Source: Ultrasonics - May 7, 2024 Category: Physics Authors: Magdalena Knak Micha ł Nitka Magdalena Rucka Source Type: research
A physics-embedded deep-learning framework for efficient multi-fidelity modeling applied to guided wave based structural health monitoring
Ultrasonics. 2024 Apr 27;141:107325. doi: 10.1016/j.ultras.2024.107325. Online ahead of print.ABSTRACTHealth monitoring of structures using ultrasonic guided waves is an evolving technology with potential applications in monitoring pipelines, civil bridges, and aircraft components. However, the sensitivity of guided waves to external parameters affects the reliability of monitoring systems based on them. These influencing factors and experimental related factors cannot be perfectly modeled, which give rise to the discrepancy between numerical simulations and experimental measurements. Therefore, it is important to address ...
Source: Ultrasonics - May 3, 2024 Category: Physics Authors: Vivek Nerlikar Roberto Miorelli Arnaud Recoquillay Oscar d'Almeida Source Type: research
A physics-embedded deep-learning framework for efficient multi-fidelity modeling applied to guided wave based structural health monitoring
Ultrasonics. 2024 Apr 27;141:107325. doi: 10.1016/j.ultras.2024.107325. Online ahead of print.ABSTRACTHealth monitoring of structures using ultrasonic guided waves is an evolving technology with potential applications in monitoring pipelines, civil bridges, and aircraft components. However, the sensitivity of guided waves to external parameters affects the reliability of monitoring systems based on them. These influencing factors and experimental related factors cannot be perfectly modeled, which give rise to the discrepancy between numerical simulations and experimental measurements. Therefore, it is important to address ...
Source: Ultrasonics - May 3, 2024 Category: Physics Authors: Vivek Nerlikar Roberto Miorelli Arnaud Recoquillay Oscar d'Almeida Source Type: research
A physics-embedded deep-learning framework for efficient multi-fidelity modeling applied to guided wave based structural health monitoring
Ultrasonics. 2024 Apr 27;141:107325. doi: 10.1016/j.ultras.2024.107325. Online ahead of print.ABSTRACTHealth monitoring of structures using ultrasonic guided waves is an evolving technology with potential applications in monitoring pipelines, civil bridges, and aircraft components. However, the sensitivity of guided waves to external parameters affects the reliability of monitoring systems based on them. These influencing factors and experimental related factors cannot be perfectly modeled, which give rise to the discrepancy between numerical simulations and experimental measurements. Therefore, it is important to address ...
Source: Ultrasonics - May 3, 2024 Category: Physics Authors: Vivek Nerlikar Roberto Miorelli Arnaud Recoquillay Oscar d'Almeida Source Type: research
A physics-embedded deep-learning framework for efficient multi-fidelity modeling applied to guided wave based structural health monitoring
Ultrasonics. 2024 Apr 27;141:107325. doi: 10.1016/j.ultras.2024.107325. Online ahead of print.ABSTRACTHealth monitoring of structures using ultrasonic guided waves is an evolving technology with potential applications in monitoring pipelines, civil bridges, and aircraft components. However, the sensitivity of guided waves to external parameters affects the reliability of monitoring systems based on them. These influencing factors and experimental related factors cannot be perfectly modeled, which give rise to the discrepancy between numerical simulations and experimental measurements. Therefore, it is important to address ...
Source: Ultrasonics - May 3, 2024 Category: Physics Authors: Vivek Nerlikar Roberto Miorelli Arnaud Recoquillay Oscar d'Almeida Source Type: research
Imaging of annulus-formation interface using reverse time migration based on ultrasonic pitch-catch measurements: Case studies from an experimental well and a field well
Ultrasonics. 2024 Apr 27;141:107323. doi: 10.1016/j.ultras.2024.107323. Online ahead of print.ABSTRACTCased-hole logging using ultrasonic pitch-catch modality is a proven technique for cement bond evaluation in cased holes. However, complex measuring environments such as tool and casing eccentering makes it difficult to precisely separate and pick the third interface echoes from full ultrasonic Lamb waves, leading to ambiguous identification of annulus-formation interface. To overcome this problem, we propose an improved cased-hole reverse time migration approach for ultrasonic pitch-catch measurements to image the annulus...
Source: Ultrasonics - May 1, 2024 Category: Physics Authors: Meng Li Hua Wang Zhilong Fang Shaopeng Shi Qiang Wang Aihua Tao Source Type: research
Monitoring fatigue cracks in riveted plates using a sideband intensity based nonlinear ultrasonic technique
This study offers a more efficient method for detecting critical fatigue cracks in rivet joints.PMID:38692212 | DOI:10.1016/j.ultras.2024.107335 (Source: Ultrasonics)
Source: Ultrasonics - May 1, 2024 Category: Physics Authors: Bo Hu Umar Amjad Tribikram Kundu Source Type: research
Lamb wave-based damage assessment for composite laminates using a deep learning approach
In this study, a convolutional sparse coding-based UNet (CSCUNet) is proposed for ultrasonic Lamb wave-based damage assessment in composite laminates. A low-resolution image is generated using delay-and-sum algorithm based on Lamb waves acquired by transducer array. The encoder-decoder framework in the proposed CSCUNet enables the transformation of low-resolution input image to high-resolution damage image. In addition, the multi-layer convolutional sparse coding block is introduced into encoder of the CSCUNet to improve both performance and interpretability of the model. The proposed method is tested on both numerical and...
Source: Ultrasonics - May 1, 2024 Category: Physics Authors: Han Zhang Fan Wang Jing Lin Jiadong Hua Source Type: research
Imaging of annulus-formation interface using reverse time migration based on ultrasonic pitch-catch measurements: Case studies from an experimental well and a field well
Ultrasonics. 2024 Apr 27;141:107323. doi: 10.1016/j.ultras.2024.107323. Online ahead of print.ABSTRACTCased-hole logging using ultrasonic pitch-catch modality is a proven technique for cement bond evaluation in cased holes. However, complex measuring environments such as tool and casing eccentering makes it difficult to precisely separate and pick the third interface echoes from full ultrasonic Lamb waves, leading to ambiguous identification of annulus-formation interface. To overcome this problem, we propose an improved cased-hole reverse time migration approach for ultrasonic pitch-catch measurements to image the annulus...
Source: Ultrasonics - May 1, 2024 Category: Physics Authors: Meng Li Hua Wang Zhilong Fang Shaopeng Shi Qiang Wang Aihua Tao Source Type: research
Monitoring fatigue cracks in riveted plates using a sideband intensity based nonlinear ultrasonic technique
This study offers a more efficient method for detecting critical fatigue cracks in rivet joints.PMID:38692212 | DOI:10.1016/j.ultras.2024.107335 (Source: Ultrasonics)
Source: Ultrasonics - May 1, 2024 Category: Physics Authors: Bo Hu Umar Amjad Tribikram Kundu Source Type: research
Lamb wave-based damage assessment for composite laminates using a deep learning approach
In this study, a convolutional sparse coding-based UNet (CSCUNet) is proposed for ultrasonic Lamb wave-based damage assessment in composite laminates. A low-resolution image is generated using delay-and-sum algorithm based on Lamb waves acquired by transducer array. The encoder-decoder framework in the proposed CSCUNet enables the transformation of low-resolution input image to high-resolution damage image. In addition, the multi-layer convolutional sparse coding block is introduced into encoder of the CSCUNet to improve both performance and interpretability of the model. The proposed method is tested on both numerical and...
Source: Ultrasonics - May 1, 2024 Category: Physics Authors: Han Zhang Fan Wang Jing Lin Jiadong Hua Source Type: research
Thermoelastic wave generation and its longitudinal wave
This study compared the performances of two optical interferometers with different characteristics when applied to measurement of pulsed thermoelastic waves. The surface displacement-tracking system was designed to measure the center of the microscopic view. A pulsed laser beam irradiated a black ink layer to generate the thermoelastic waves. The out-of-plane displacement on the axially opposite side was then measured using either a Michelson interferometer or a Sagnac interferometer. The objective lens of the system was of a type commonly used in biological observations. The Michelson interferometer estimated a maximum di...
Source: Ultrasonics - April 30, 2024 Category: Physics Authors: Kazuki Tamura Ken-Ya Hashimoto Shinpei Okawa Source Type: research
Thermoelastic wave generation and its longitudinal wave
This study compared the performances of two optical interferometers with different characteristics when applied to measurement of pulsed thermoelastic waves. The surface displacement-tracking system was designed to measure the center of the microscopic view. A pulsed laser beam irradiated a black ink layer to generate the thermoelastic waves. The out-of-plane displacement on the axially opposite side was then measured using either a Michelson interferometer or a Sagnac interferometer. The objective lens of the system was of a type commonly used in biological observations. The Michelson interferometer estimated a maximum di...
Source: Ultrasonics - April 30, 2024 Category: Physics Authors: Kazuki Tamura Ken-Ya Hashimoto Shinpei Okawa Source Type: research
Experimental study on opto-acoustic nonlinear frequency-mixing technique with separated basic temperature
Ultrasonics. 2024 Apr 26;141:107331. doi: 10.1016/j.ultras.2024.107331. Online ahead of print.ABSTRACTDifferent from the traditional frequency-mixing technique which employs a contacting transducer, the laser-induced acoustic nonlinear frequency-mixing detection technique utilizes a laser source to instigate crack motion and generate acoustic waves. Thus, apart from the temperature oscillation induced by the pump laser, the "basic temperature" originating from the probe laser can also influence the crack. This additional variable complicates the contact state of the crack, yielding a more diverse range of nonlinear acousti...
Source: Ultrasonics - April 29, 2024 Category: Physics Authors: Chen-Yin Ni Ling Yuan Yi-Fei Zhang Kai-Ning Ying Zhong-Hua Shen Hong-Chao Zhang Source Type: research
Experimental study on opto-acoustic nonlinear frequency-mixing technique with separated basic temperature
Ultrasonics. 2024 Apr 26;141:107331. doi: 10.1016/j.ultras.2024.107331. Online ahead of print.ABSTRACTDifferent from the traditional frequency-mixing technique which employs a contacting transducer, the laser-induced acoustic nonlinear frequency-mixing detection technique utilizes a laser source to instigate crack motion and generate acoustic waves. Thus, apart from the temperature oscillation induced by the pump laser, the "basic temperature" originating from the probe laser can also influence the crack. This additional variable complicates the contact state of the crack, yielding a more diverse range of nonlinear acousti...
Source: Ultrasonics - April 29, 2024 Category: Physics Authors: Chen-Yin Ni Ling Yuan Yi-Fei Zhang Kai-Ning Ying Zhong-Hua Shen Hong-Chao Zhang Source Type: research
