Article
Multidisciplinary Sciences
Nao Terasaki, Yuki Fujio
Summary: This study demonstrates a method for evaluating crack propagation and mechanical behavior in adhesive joints using mechanoluminescence (ML) technology. The process involves sample preparation, application of ML paint, and measurement using ML sensors. The results obtained from double cantilever beam and lap-shear tests show the potential of ML visualization in evaluating adhesive materials. This technique allows for the precise identification of crack tips and other mechanical behaviors related to structural failure.
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
(2023)
Article
Engineering, Civil
Eyoab Zegeye-Teshale, Thomas Calhoon, Eddie Johnson, Shongtao Dai
Summary: This paper discusses the use of an integrated multi-sensor non-destructive testing methodology to evaluate and characterize pavements affected by tenting, revealing important characteristics of the tented cracks and the potential of GPR measurements to investigate underneath moisture conditions. The study successfully developed test parameters from longitudinal profile measurements to capture the intensity and frequency of the tented cracks, and the data analysis led to the characterization of the tested roads and determination of critically affected segments. The findings and tools developed in this study were compared with local engineers' observations, synthesizing knowledge and recommendations for incorporation into the paper.
TRANSPORTATION RESEARCH RECORD
(2021)
Article
Materials Science, Multidisciplinary
Yonglin Huang, Yi Huang, Shuncong Zhong, Caihong Zhuang, Tingting Shi, Zhenghao Zhang, Zhixiong Chen, Xincai Liu
Summary: A non-destructive testing method for crack defects in self-lubricating sliding bearing coatings based on terahertz time-domain spectroscopy was proposed in this study. Experiments revealed that the self-lubricating coating materials have good penetration and characteristic response in the terahertz band. To solve the problem caused by signal overlap, a broad learning system was used for classifying and predicting time-domain signals of crack defects. The identification accuracy for crack defects was 96.08%, and the mean relative errors of prediction for interface and internal cracks (5 to 95 μm in size) were 4.16% and 3.40% respectively. The method proved to be applicable for qualitative and quantitative evaluation of crack defects in self-lubricating coatings, providing a new idea for non-destructive testing.
Article
Mathematics
Seogu Park, Jinwoo Song, Heung Soo Kim, Donghyeon Ryu
Summary: Delamination is a common defect in carbon fiber-reinforced composite laminates, which has a significant impact on the performance of laminated composite structures. This paper presents a method of detecting the delamination of composites using mechanoluminescent sensors (ML) that can provide visual information about changes in the physical quantity of the structure.
Article
Forestry
Chandan Kumar, Steven Psaltis, Henri Bailleres, Ian Turner, Loic Brancheriau, Gary Hopewell, Elliot J. Carr, Troy Farrell, David J. Lee
Summary: A novel non-destructive method has been developed to predict modulus of elasticity (MOE) of logs using measurements taken from cores extracted from discs. The method shows that a single core from breast height is sufficient to predict MOE of logs, allowing early grading and sorting of logs for optimal use and processing. The integral average method predicted the BING-MOE more accurately with lower bias compared with other existing tools without any complex equipment, analysis, and statistical calibration for segregating out individual trees or stands.
ANNALS OF FOREST SCIENCE
(2021)
Article
Polymer Science
Ida Krasevec, Natasa Nemecek, Maja Lozar Stamcar, Irena Kralj Cigic, Helena Prosen
Summary: Wood, an important constituent of heritage collections, is often treated with harmful substances due to its susceptibility to biodegradation. Non-destructive SPME methods have been developed to quantify pentachlorophenol residues in wood, with successful application in museum objects.
Article
Materials Science, Characterization & Testing
Aldecira G. Diogenes, Elineudo Pinho de Moura, Andre da Silveira Machado, Lindberg Lima Goncalves
Summary: The paper proposes a non-destructive method based on electromagnetic induction technique for identifying corrosion in steel bars used in reinforced concrete structures. Magnetic tests were conducted on steel bars of different diameters at different depths, with statistical and pattern classification analyses performed on the data. The results suggest that the investigated method shows great potential as an electromagnetic non-destructive technique for identifying corroded steel bars in concrete structures.
NONDESTRUCTIVE TESTING AND EVALUATION
(2022)
Article
Materials Science, Composites
Sina Sabbaghi Farshi, Davood Akbari
Summary: This paper presents a model to quantitatively evaluate subsurface cracks in various locations on GRE pipes by integrating the finite element method and shearography with thermal stimulation. The results show that the crack placement angle has an impact on crack detectability. A model is proposed to estimate the length and depth of the crack based on the displacement derivative graph.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Construction & Building Technology
Maryam Monazami, Ashutosh Sharma, Rishi Gupta
Summary: The installation of concrete pavements at bus stops can improve resistance to deterioration, with innovative materials like CFRC showing superior performance compared to normal concrete. Real-time monitoring and various tests showed that CFRC bus pads have fewer cracks and better durability, leading to increased service life and lower electrical resistivity compared to traditional concrete bus pads.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Materials Science, Characterization & Testing
C. Boue, S. Hole
Summary: This method combines lock-in thermography with laser excitation to estimate the depth of open cracks in metal with curvilinear shapes contactlessly. By measuring heat diffusion disturbances induced by cracks and analyzing the thermal signature extracted from surface temperature images at various scanning speeds, local evaluation of crack depth can be achieved.
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2022)
Article
Construction & Building Technology
Sanggoo Kang, Suyun Ham, Kyu-Jung Kim
Summary: This paper presents an analytical, numerical, and experimental study on surface wave scattering for an internal vertical crack (SWS-IVC). The analytical model is validated through comparison with FE simulations and experimental measurements, allowing for crack depth estimation and advancing crack evaluation based on relative wave energy attenuation.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Computer Science, Information Systems
Xianchang Meng, Yili Zheng, Weiping Liu
Summary: This paper designs a non-destructive detection device for plant leaf expansion pressure in order to promote research on plant leaf expansion pressure and achieve precision irrigation. The design is based on leaf expansion pressure probe technology, which effectively monitors plant leaf expansion pressure by detecting the feedback of the leaf under constant pressure. The stability and calibration model of the sensor were tested, and the experiments showed satisfactory results. The importance of this device is rated 8 out of 10.
Review
Materials Science, Characterization & Testing
M. Mwelango, T. Zhu, K. Wen, Z. Zhang, X. Yuan, W. Li, X. Yin
Summary: This review paper provides a systematic overview of the coplanar capacitive sensing technique for non-destructive evaluation. It covers the fundamentals of the technique, factors affecting sensor performance, designs of coplanar capacitive sensors for defect detection, and various applications in different fields. The challenges and future prospects of the technique are also discussed.
NONDESTRUCTIVE TESTING AND EVALUATION
(2023)
Article
Chemistry, Analytical
Ana Luisa Rodrigues, Rosa Marques, Maria Isabel Dias, Maria Isabel Prudencio, Dulce Russo, Mariana Diniz, Andrea Martins, Cesar Neves, Zsolt Kasztovszky, Ildiko Harsanyi, Veronika Szilagyi, Imre Kovacs, Zoltan Szokefalvi-Nagy
Summary: This study focuses on the contribution of Vila Nova de Sao Pedro (VNSP) as a production center of symbolic lithic artifacts. Non-destructive analytical methods were used for the first time to obtain a detailed chemical characterization of these remarkable artifacts. The results indicate that these artifacts were mainly produced using local raw materials.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Engineering, Marine
Yan Dong, Xiangyu Kong, Gansheng An, Jichuan Kang
Summary: This study aims to assess the fatigue reliability of single-sided girth welds in offshore pipelines and risers, taking into account Non-destructive Inspection (NDI) through crack propagation analyses. The study shows that the initial crack size distribution can be significantly changed by NDI and possible repair, and the effect of misalignment on fatigue strength is not as significant as recommended by the fatigue design code.
Article
Chemistry, Multidisciplinary
Shaobo Tu, Masayuki Mizohata, Guan Sheng, Lingmei Liu, Fangwang Ming, Chao-Nan Xu, Dong Tu, Xixiang Zhang, Husam N. Alshareef
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Dong Tu, Chao-Nan Xu, Sunao Kamimura, Yoichi Horibe, Hirotaka Oshiro, Lu Zhang, Yoshiharu Ishii, Koji Hyodo, Gerard Marriott, Naohiro Ueno, Xu-Guang Zheng
ADVANCED MATERIALS
(2020)
Article
Chemistry, Physical
Yuki Fujio, Chao-Nan Xu, Yoshitaro Sakata, Naohiro Ueno, Nao Terasaki
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Electrochemistry
Yuki Fujio, Chao-Nan Xu, Nao Terasaki
Summary: By utilizing an organic acid-aided method, this study successfully modulated the NIR-ML intensity of SrAl2O4:Eu ML material and synthesized ML materials with multi-metal elements, showcasing the properties of multi-wavelength luminescence. The SrAl2O4 doped with Eu2+, Cr3+, and Nd3+ ions exhibited the highest ML intensity among the synthesized materials, with almost no difference in crystal structure and particle morphology. Additionally, the correlation between photoluminescence intensity and additive metal elements suggested that the NIR-ML intensity was generated through energy transfer from Eu2+ ion to Cr3+ and Nd3+ ions.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Physics, Applied
Daichi Suzuki, Daniela Serien, Kotaro Obata, Koji Sugioka, Aiko Narazaki, Nao Terasaki
Summary: In this study, the potential and application of laser-based micro-processing for patterning CNT films were assessed. It was found that this method can pattern micrometre-thick CNT films in micrometre spatial resolution and directly pattern the CNT films inside the protective film, which is not achievable by other processing technologies.
APPLIED PHYSICS EXPRESS
(2022)
Article
Physics, Applied
Yoshitaro Sakata, Nao Terasaki
Summary: In this study, a novel non-contact thermal stress-induced light-scattering method (N-SILSM) is proposed for detecting polishing-induced microcracks on the surface of glass substrates. Microcracks and tiny particles can be distinguished and measured using temperature variation. This method contributes to improving the quality of glass substrate manufacturing and reducing defects.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
Nao Terasaki, Nao Ando, Kei Hyodo
Summary: This study proposes a novel method of using mechanoluminescent visual sensing to fill the gap in originally invisible mechanical behavior in modeling, evaluation and products. In folding tests of flexible electronic films, the method successfully visualizes strain concentration and provides instinctive understanding of complex dynamic mechanical information. Additionally, the mechanoluminescent pattern is influenced by the sticking situation of the flexible film on a folding plate with gripping tape.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Engineering, Chemical
Nao Terasaki, Yuki Fujio, Shin Horiuchi, Haruhisa Akiyama, Masami Itabashi
Summary: The study found that the shape of the bonding area in cross tension tests can lead to inconsistent stress concentration behaviors and crack growth/peeling behavior, which cause high scattering of CTS values. In contrast, using CT specimens with circular adhesive regions significantly reduced the scattering of CTS values and produced consistent mechanoluminescent patterns. This suggests that mechanoluminescence has the potential to effectively visualize mechanical behavior for optimizing test designs.
JOURNAL OF ADHESION
(2022)
Article
Multidisciplinary Sciences
Kazuya Kikunaga, Nao Terasaki
Summary: This article introduces a luminescent material that enables the visualisation of static electricity, providing potential applications in solving industrial problems and observing electric charges in the air.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Daichi Suzuki, Yuma Takida, Yukio Kawano, Hiroaki Minamide, Nao Terasaki
Summary: This study reports the thermal and optical characteristics of CNT films and presents an optimal device structure and improved sensor performance. By serially connecting multiple elements and designing with the optimal structure, the detection sensitivity was significantly enhanced. Furthermore, the potential of CNT films for THz spectroscopy applications was demonstrated.
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2022)
Article
Chemistry, Analytical
Yuki Fujio, Chao-Nan Xu, Nao Terasaki
Summary: This study proposes a non-destructive testing method for bidirectional fiber bundles of carbon-fiber-reinforced plastic laminates using mechanoluminescence technique. The results show that the ML sensor can accurately evaluate the strain distribution and fracture phenomena of CFRP laminates, visualize the load share between fiber bundles, and track the fracture process with high spatial resolution.
Article
Nanoscience & Nanotechnology
Daichi Suzuki, Yoshiyuki Nonoguchi, Kazumasa Shimamoto, Nao Terasaki
Summary: A highly stable technique for fabricating n-doped carbon nanotube (CNT) films is reported, where air stability is achieved by completely covering CNTs with n-dopants to prevent oxidation. The introduction of a parylene protective layer allows for air stability for over 365 days, and the n-doped CNTs demonstrate outstanding thermoelectric power generation in strong acids, alkalis, and alcohols. This versatile stabilization technique can be applied to various n-dopants and is expected to be crucial for practical applications of CNT devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Hirotaka Hara, Chao-Nan Xu, Ruiping Wang, Xu-Guang Zheng, Maiko Nishibori, Eiji Nishibori
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2020)
Article
Engineering, Manufacturing
Shin Horiuchi, Nao Terasaki, Masami Itabashi
MANUFACTURING REVIEW
(2020)
