Article
Materials Science, Characterization & Testing
Frederick A. F. Purcell, Matthew R. Pearson, Mark J. Eaton, Rhys Pullin
Summary: The need for fast and effective Non-Destructive Testing techniques is crucial. This work introduces a novel application of Wave Mode Spectroscopy (WMS) combined with feature detection for complex geometric shapes. Using a 3D Scanning Laser Doppler Vibrometer (SLDV), the geometry of the specimen is determined during the wavefields measurement, allowing accurate thickness maps to be generated.
NDT & E INTERNATIONAL
(2022)
Article
Engineering, Multidisciplinary
Beata Zima
Summary: Guided waves have recently received significant attention as a promising research area in non-destructive wave-based methods. This article presents an analysis of wave propagation in plates with variable thickness using analytical, numerical, and experimental methods. The results provide insights into the influence of thickness distribution on wave velocity, wave packet time course, and amplitude. Additionally, a novel approach based on constrained convex optimization for determining plate thickness distribution is proposed and verified.
Article
Instruments & Instrumentation
Kaleeswaran Balasubramaniam, Shirsendu Sikdar, Dominika Ziaja, Michal Jurek, Rohan Soman, Pawel Malinowski
Summary: This paper emphasizes the effective quantification of hidden damage in composite structures using ultrasonic guided wave (GW) propagation-based structural health monitoring (SHM) and an artificial neural network (ANN) based active infrared thermography (IRT) analysis. The main novelties in this paper include the implementation of an improved SHM GW algorithm to localize the damages, a new pixel-based confusion matrix to quantify the size of the damage threshold, and a newly developed IRT-ANN algorithm to validate the damage quantification. The robust SHM methods effectively identified, localized, and quantified the different damage dimensions against the non-destructive testing-IRT method in different composite structures.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Robert Misiewicz, Jedrzej Stanislaw Wieckowski
Summary: This article introduces a research approach that assesses the technical condition of complex technical objects, focusing on load-carrying structures. It describes a procedure that combines experimental research techniques and computer computations using the finite element method to evaluate the technical condition of the structure. The approach is exemplified with two objects in the article.
APPLIED SCIENCES-BASEL
(2021)
Article
Construction & Building Technology
Jagadeeshwar L. Tabjula, Srijith Kanakambaran, Sheetal Kalyani, Prabhu Rajagopal, Balaji Srinivasan
Summary: This approach proposes a statistical method for defect identification and localization in composite plates with a reduced number of sensing points compared to conventional imaging techniques. It utilizes outlier detection and median absolute deviation computation for efficient detection of defects. Extensive simulations confirm robustness and experimental results show successful detection of delamination even under low SNR conditions.
STRUCTURAL CONTROL & HEALTH MONITORING
(2021)
Article
Multidisciplinary Sciences
Jung-Un Park, Amy Wei-Lun Tsai, Alexandrea N. N. Rizo, Vinh H. H. Truong, Tristan X. X. Wellner, Richard D. D. Schargel, Elizabeth H. H. Kellogg
Summary: CRISPR-associated transposons (CAST) are programmable mobile genetic elements that insert large DNA cargos using an RNA-guided mechanism. In this study, the structure of a reconstituted CAST transpososome from Scytonema hofmannii was determined, revealing the modular association between its components. The structure also provided insights into the interactions and conformational changes of the transpososome, suggesting ways to improve CAST transposition for precision genome-editing applications.
Article
Engineering, Mechanical
A. Nokhbatolfoghahai, H. M. Navazi, R. M. Groves
Summary: In this paper, an adaptive dictionary learning framework is proposed to enhance the performance of the sparse reconstruction method in complex engineering structures. The framework combines analytical modeling with training data sets and learning methods. An experimental evaluation confirms the concept of the proposed framework for improving the health monitoring of complex structures.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Mechanical
A. Nokhbatolfoghahai, H. M. Navazi, R. M. Groves
Summary: This paper proposes an adaptive dictionary learning framework to enhance the performance of the sparse reconstruction method in real complex engineering structures. The framework combines analytical modeling with training data sets and learning methods. Experimental evaluation on an anisotropic composite plate showed the potential of the framework for improved health monitoring of complex structures.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Review
Physics, Multidisciplinary
Nail Akhmediev
Summary: The solutions of the nonlinear Schrodinger equation are universal and can be applied to various physics fields, describing unique events like waves appearing from nowhere. These solutions form complex structures, including patterns resembling atomic structures.
FRONTIERS IN PHYSICS
(2021)
Article
Construction & Building Technology
Jingrong Li, Ye Lu, Hongwei Ma
Summary: In this study, the linear and nonlinear methods were compared for debonding evaluation in CFRP-reinforced steel structures. It was found that the linear guided wave method is effective in detecting gross damage, while the nonlinear method is more sensitive to micro damage. The feasibility of monitoring the entire debonding process by combining these two methods was verified through fatigue tests.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Characterization & Testing
Ruoyu Chen, Khiem T. Tran, Kien Dinh, Christopher C. Ferraro
Summary: This paper presents a novel application of 2D full-waveform inversion of ultrasonic SH-waves for determining cover depth and size of embedded rebar in concrete structures. The results show that this method is able to accurately characterize both the depths and sizes of rebars, providing higher accuracy compared to other methods.
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2022)
Article
Engineering, Chemical
Shanmukha Shetty, Sauvik Banerjee, Siddharth Tallur, Yogesh M. Desai
Summary: This study presents a non-destructive structural health monitoring (SHM) approach using ultrasonic guided waves with multi-physics modelling to monitor and forecast strength degradation of corroding steel. The major findings include empirical relationships between guided wave characteristics and reduced yield, ultimate, and buckling strength of corroded steel, as well as a multi-physics numerical model of corrosion in RC structures. The data fusion strategy combining guided wave-based monitoring and multi-physics modelling is found to be valuable in assessing the current state of degradation and predicting the service life based on strength.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2023)
Article
Medicine, General & Internal
Joo Myung Lee, Ki Hong Choi, Young Bin Song, Jong-Young Lee, Seung-Jae Lee, Sang Yeub Lee, Sang Min Kim, Kyeong Ho Yun, Jae Young Cho, Chan Joon Kim, Hyo-Suk Ahn, Chang-Wook Nam, Hyuck-Jun Yoon, Yong Hwan Park, Wang Soo Lee, Jin-Ok Jeong, Pil Sang Song, Joon-Hyung Doh, Sang-Ho Jo, Chang-Hwan Yoon, Min Gyu Kang, Jin-Sin Koh, Kwan Yong Lee, Young-Hyo Lim, Yun-Hyeong Cho, Jin-Man Cho, Woo Jin Jang, Kook-Jin Chun, David Hong, Taek Kyu Park, Jeong Hoon Yang, Seung-Hyuk Choi, Hyeon-Cheol Gwon, Joo-Yong Hahn
Summary: This study found that intravascular imaging-guided percutaneous coronary intervention (PCI) can reduce the risk of death from cardiac causes, target-vessel-related myocardial infarction, or clinically driven target-vessel revascularization compared to angiography-guided PCI in patients with complex coronary-artery lesions.
NEW ENGLAND JOURNAL OF MEDICINE
(2023)
Article
Engineering, Civil
Beata Zima, Jochen Moll
Summary: Guided waves have gained attention in NDT and SHM due to their ability to travel long distances without energy loss and sensitivity to small defects. This study focuses on wave propagation in metallic plates with variable thickness, presenting research on the influence of non-uniform thickness distribution on wave velocity and shape reconstruction based on time of flight analysis.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Article
Acoustics
Yanhui Zhang, Qiang Gao
Summary: Based on the symplectic structure of the Hamiltonian matrix, the precise integration method (PIM), and the Wittrick-Williams (W-W) algorithm, a generalized method for computing the dispersion curves of guided waves in multilayered anisotropic magneto-electro-elastic (MEE) structures is developed. A symplectic transformation is introduced to overcome the difficulty of applying the W-W algorithm in MEE structures.
SHOCK AND VIBRATION
(2022)
Article
Materials Science, Characterization & Testing
Bin Ma, Qingzhao Kong, Yewei Ding, Lin Chen, Weihang Gao
Summary: This study proposes an end-to-end damage detection framework that integrates emphasized channel attention, propagation, and aggregation-time-delay neural network (ECAPA-TDNN) with percussion techniques. The framework effectively detects internal damage within timber structures and distinguishes between different sizes of damage.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Zhiyuan Zhao, Lishuai Liu, Wen Liu, Da Teng, Yanxun Xiang, Fu-Zhen Xuan
Summary: The total focusing method (TFM) is a standard technique in ultrasonic phased array imaging and plays a crucial role in industrial non-destructive testing (NDT). This paper presents an improved TFM approach by formulating its imaging principle as a Boolean matrix and establishing a discretized tensor-based model. By employing sparse regularization strategy and a non-negative constraint solution algorithm, the proposed approach demonstrates superior capabilities in defect characterization and noise suppression compared to the traditional TFM.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Dongsoo Lee, Jung-Doung Yu, Seokgyu Jeong, Geunwoo Park, Jong-Sub Lee
Summary: This study suggests a more accurate method for evaluating the integrity of drilled shafts using electromagnetic waves propagating through transmission lines. The experimental results show that the location and size of sound and defect segments can be more clearly identified with the use of connectors on the transmission line.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Lu-Nan Dai, Chen-Yin Ni, Kai-Ning Ying, Ling Yuan, Zhi Yang, Wei-Wei Kan, Zhong-Hua Shen
Summary: A laser ultrasonics based frequency domain synthetic aperture focusing technology has been developed for imaging internal horizontal hole defects in bimetallic composites with a diameter of approximately 1.0 mm. The results show that this technology can improve imaging quality and locating capability, with a low testing error.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Guillermo Cosarinsky, Jorge F. Cruza, Mario Munoz, Jorge Camacho
Summary: This study develops an ultrasound imaging method for industrial and structural components, which can automatically detect the surface and estimate the probe position and orientation. By fitting the parametric models based on measured surface echoes, the method achieves the measurement of surface echoes and estimation of probe position and orientation. Validation experiments show that this method can accurately detect defects in the component under different probe positions and orientations.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
L. Gahleitner, G. Thummerer, G. Mayr, G. Mayr, P. Burgholzer, U. Cakmak
Summary: This study presents a one-dimensional photothermal method using the virtual wave concept to estimate subsurface interface parameters and demonstrates its application in layered materials. Experimental results validate the accurate estimation of interfacial parameters for the analyzed samples.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Pengxiang Ji, Yiming Jiang, Ruobing Zhao, Jing Zou
Summary: Computed laminography (CL) is a non-destructive imaging technique for plate-like samples that has challenges in exact reconstruction. Fusion laminography (FL) combines Fourier information from CL and CT to achieve precise reconstruction, showing superiority in artifact removal and edge preservation, particularly for irregular sample structures.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Guangzhi Chen, Odile Abraham, Damien Pageot, Olivier Durand, Mathieu Chekroun, Vincent Tournat
Summary: This paper investigates the application of Nonlinear Coda Wave Interferometry (NCWI) method in evaluating the nonlinear interface areas in highly heterogeneous materials. An experimental protocol is proposed and validated through numerical simulation and experimental results. The findings demonstrate that NCWI can be used to quantitatively analyze the nonlinear interface effects in complex media.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Ronghua Xu, Raul Enrique Beltran-Gutierrez, Max Kaeding, Alexander Lange, Steffen Marx, Joern Ostermann
Summary: This study compares the signal response of four different couplant materials in acoustic emission analysis and ultrasonic testing, and analyzes their impact on the signal response of a piezoelectric sensor. The results indicate that acrylic adhesive pads and hot glue demonstrate more reliable signal transmission in certain frequency ranges, while honey and vaseline perform better in other frequency ranges. Acrylic adhesive pads and honey are considered the preferred couplant materials.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Yong-Ho Kim, Jung-Ryul Lee
Summary: An artificial intelligence system for phased-array ultrasonic testing (PAUT) was developed in this study using a newly configured training dataset and neural network. Three experiments were conducted to verify its performance, showing improved classification accuracy of signals and successful data evaluation, benefiting the PAUT experts.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Shaun Mcknight, S. Gareth Pierce, Ehsan Mohseni, Christopher Mackinnon, Charles Macleod, Tom 'Hare, Charalampos Loukas
Summary: This work proposes four synthetic data generation methods to address the issue of limited training data in Non-Destructive Ultrasonic Testing. Experimental results demonstrate that these methods significantly improve the classification performance of real experimental images.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Xintao Xu, Zhixuan Chang, Eryong Wu, Shiwei Wu, Jian Chen, Keji Yang, Haoran Jin
Summary: This paper proposes a novel nozzle-side inspection method based on the data fusion of multi-view plane wave imaging (PWI) for ultrasonic non-destructive testing of nozzle-to-pipe welds. Experiments demonstrate the capability of sensitivity mappings to optimize the inspection configuration and serve as filters to fuse multi-view images. The proposed method enables accurate defect characterization and detection of slag, cracks, and lack of penetration in nozzle specimens.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Kai Wang, Zechen Luo, Shuang Xu, Wenxin Lai, Ruiqi Guan, Qijian Liu, Menglong Liu, Jing Rao, Xinlin Qing
Summary: In this study, an analytical framework is proposed to interpret the formation of defect-induced LDR in multilayered structures. By analyzing the reflections of Lamb waves at defect boundaries and obtaining the phase shift of reflected waves, the relationship between LDR frequency components and defect size is determined. Experimental validations are performed to improve the precision of defect characterization using LDR.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Shijie Jin, Chengjun Di, Jiakai Su, Siqi Shi, Zhongbing Luo
Summary: This paper proposes a mirrored composite-mode total focusing method (CTFM) for the quantitative detection and profile characterization of priori unknown irregular planar defects. Multiple views and normalization are used to achieve accurate imaging results.
NDT & E INTERNATIONAL
(2024)
