Article
Acoustics
Chen-Yin Ni, Chu Chen, Kai-Ning Ying, Lu-Nan Dai, Ling Yuan, Wei-Wei Kan, Zhong-Hua Shen
Summary: The LU-based F-SAFT algorithm is developed to visualize horizontal hole-type defects in aluminum. By incorporating optimizations such as velocity mapping and frequency range selection, small defects can be visualized in 3D with improved image quality and reconstruction speed. The wide-band generation characteristic of the LU technique allows for a higher Signal-to-Noise Ratio in the acoustic wave signals.
Article
Materials Science, Multidisciplinary
D. Vangi, M. Bruzzi, J. N. Caron, M. S. Gulino
Summary: Gas-Coupled Laser Acoustic Detection (GCLAD) is a non-contact ultrasonic detection technique that relies on the deviation of a probe laser beam intersected by an acoustic wavefront in a fluid. In this study, a compact GCLAD probe is developed using two mirrors to confine the laser beam and maximize the portion subjected to ultrasonic oscillation. The compact probe maintains the same signal amplitude as the non-compact alternative, expanding the technique's application range to cases where point detectors are desirable.
EXPERIMENTAL MECHANICS
(2022)
Article
Automation & Control Systems
Leslie Bustamante, Natarajan Jeyaprakash, Che-Hua Yang, Sheng-Po Tseng
Summary: This study introduced a hybrid laser-air coupled ultrasonic system for material detection, calculating material properties through experimental measurements and inversion technique, and obtaining results that are in good agreement with the actual properties, demonstrating the feasibility and accuracy of the system.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Jun Zhang, Xin Zhao, Bing Yang, Jingyu Li, Yan Liu, Guanbing Ma, Shuxian Yuan, Jinfeng Wu
Summary: A noncontact and nondestructive method based on laser ultrasound was proposed to evaluate porosity in additive manufacturing components. The study found that the surface wave speed, peak frequency, and wavelet packet energy of laser ultrasound are highly correlated with porosity, enabling quantitative nondestructive evaluation of porosity.
Article
Materials Science, Characterization & Testing
Kazufumi Nomura, Shintaro Mishima, Soshi Deno, Tomokazu Sano
Summary: This study aims to establish a highly efficient and high-speed resistance spot-weld inspection method that can be applied to wholelot inspection. The nugget diameter is measured using laser ultrasonic technique, allowing remote, non-contact ultrasonic inspection. The results show that differences in the nugget diameter can be distinguished based on the arrival time of the diffraction waves, and the nugget diameter can be calculated by determining the propagation velocity of the diffraction wave.
NDT & E INTERNATIONAL
(2023)
Article
Physics, Applied
Yong Lee, So Kitazawa, Rikesh Patel
Summary: The study proposed a simple non-contact inspection method using laser ultrasonic technique to measure the thickness of a surface-hardened layer. By selectively extracting surface waves with desired wavelength and directly obtaining surface-wave velocity from temporal waveforms, the method simplifies the conventional approach based on dispersion for measuring hardened layer thickness.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2021)
Article
Engineering, Mechanical
Zaiwei Liu, Bin Lin, Xiaohu Liang, Anyao Du
Summary: In this paper, a technology for estimating the mechanical properties and residual stress of machined surfaces, especially for ground silicon wafer, based on laser-excited surface acoustic waves (LSAWs) is developed. Bayesian inversion and Markov chain Monte Carlo (MCMC) method are used to estimate the elastic constants and residual stress of the subsurface damage (SSD) layer, and corresponding uncertainties are provided. Experimental results demonstrate that this technology can accurately characterize SSD and residual stress.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Acoustics
Xiaohu Liang, Bin Lin, Zaiwei Liu, Xiaokang Ma
Summary: The research investigates the influence of surface roughness on the dispersion and attenuation of surface acoustic wave (SAW) and finds that surface roughness has a significant impact on both dispersion and attenuation.
Article
Engineering, Multidisciplinary
Li Zhang, Xia Xiao, Haiyang Qi, Yiting Huang, Huiquan Qin
Summary: The laser-generated surface acoustic wave (SAW) technique is a promising method for quick and nondestructive measurement of the mechanical properties of thin films. In this study, a SAW-based method is proposed to quantitatively measure the residual stress in nanostructured films. The experimental results show that the residual stress of SiO2 films is compressive.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Che-Hua Yang, N. Jeyaprakash, Yu-Wei Hsu
Summary: This study mainly focused on the thermal aging behavior of duplex stainless steel in high-temperature working environments, investigating its impact on material properties. Ultrasonic testing and traditional material testing methods revealed that with longer thermal aging durations, the hardness of duplex stainless steel increases while the phase velocity first increases and then decreases.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2021)
Article
Acoustics
Jing Xiao, Jian Chen, Xudong Yu, Danylo Lisevych, Zheng Fan
Summary: The paper presents a non-contact method using ultrasonic Rayleigh waves generated by a pulsed laser to characterize surface slots with large lengths. The length of the slot can be calculated from the time-of-flight information of Rayleigh waves without prior knowledge of its orientation, width or aspect ratio. Both numerical simulations and experiments demonstrate the proposed method showing excellent performance.
Article
Food Science & Technology
Nayuta Arai, Masafumi Miyake, Kengo Yamamoto, Itsuro Kajiwara, Naoki Hosoya
Summary: Various methods based on acoustic vibration characteristics have been explored to indirectly assess fruit ripeness through fruit firmness. This study focuses on using a Rayleigh wave to assess mango flesh firmness in a non-contact and non-destructive manner, by observing how the wave propagation velocity correlates with fruit firmness. The impact of storage time on firmness changes is also investigated, with the Rayleigh wave propagation velocity showing sensitivity to these changes.
Article
Acoustics
Xing Kou, Cuixiang Pei, Zhenmao Chen
Summary: This study presents a noncontact nonlinear ultrasonic testing method based on lasers for closed surface crack inspection. Through nonlinear numerical simulation and experiment verification, it is proved that the method can increase the acoustic nonlinearity parameter with the micro closed crack length and decrease it with the micro closed crack buried depth.
Article
Acoustics
Maxime Farin, Emmanuel Moulin, Lynda Chehami, Farouk Benmeddour, Cyril Nicard, Pierre Campistron, Olivier Brehault, Lucie Dupont
Summary: This paper presents a novel ultrasonic method based on coda wave interferometry to detect and quantify thickness loss caused by saltwater corrosion of steel samples. The experimental results demonstrate that the method has high accuracy and sensitivity, and can provide real-time monitoring of corrosion spread and rate.
Article
Acoustics
Wenze Shi, Yanshan Tong, Chao Lu, Yao Chen, Gongtian Shen, Guangdeng Zeng
Summary: This paper proposes a method to improve the energy conversion efficiency of laser-EMAT ultrasonic testing in metal materials by using a surface constraint mechanism. The effects of different parameters on the ultrasonic echo amplitude and multimode ultrasonic energy distribution ratio are investigated. The results show that the use of a surface constraint mechanism significantly improves the amplitude and signal-to-noise ratio of the ultrasound.
Article
Engineering, Biomedical
Ali Entezari, Zhongpu Zhang, Andrian Sue, Guangyong Sun, Xintao Huo, Che-Cheng Chang, Shiwei Zhou, Michael V. Swain, Qing Li
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2019)
Article
Materials Science, Ceramics
Buesra Bor, Diletta Giuntini, Berta Domenech, Michael V. Swain, Gerold A. Schneider
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2019)
Article
Materials Science, Multidisciplinary
Wu Shengling, Simon Fleming, Boris T. Kuhlmey, Heike Ebendorff-Heidepriem, Alessio Stefani
OPTICAL MATERIALS EXPRESS
(2019)
Article
Dentistry, Oral Surgery & Medicine
Yutao Jian, Li Dao, Xiaodong Wang, Xinping Zhang, Michael Swain, Ke Zhao
Article
Dentistry, Oral Surgery & Medicine
R. A. Al-Shatti, G. H. Dashti, S. Philip, S. Michael, M. Swain
Article
Optics
Juliano G. Hayashi, Alessio Stefani, Sergei Antipov, Richard Lwin, Stuart D. Jackson, Darren D. Hudson, Simon Fleming, Alexander Argyros, Boris T. Kuhlmey
Article
Engineering, Electrical & Electronic
Juliano G. Hayash, Richard Lwin, Alessio Stefani, Simon Fleming, Boris T. Kuhlmey, Alexander Argyros
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2019)
Article
Engineering, Biomedical
Jasmin Koldehoff, Michael Swain, Gerold A. Schneider
ACTA BIOMATERIALIA
(2020)
Article
Polymer Science
Ivan D. Rukhlenko, Syamak Farajikhah, Charles Lilley, Andre Georgis, Maryanne Large, Simon Fleming
Article
Engineering, Biomedical
Syamak Farajikhah, Antoine F. J. Runge, Badwi B. Boumelhem, Ivan D. Rukhlenko, Alessio Stefani, Sepidar Sayyar, Peter C. Innis, Stuart T. Fraser, Simon Fleming, Maryanne C. J. Large
Summary: The study reports a scalable and inexpensive fiber fabrication technique for generating PCL fibers of various geometries with the potential for biomedical applications and tissue engineering. The fibers demonstrate stable optical propagation loss and support cell growth, making them attractive for optical neural interfacing in biomedical applications. The ability to tailor the surface morphology of biodegradable PCL fibers and their non-cytotoxicity enhance their suitability for diverse biomedical applications and tissue engineering.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Deepak Jain, Jayanta K. Sahu, Simon Fleming
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2020)
Article
Materials Science, Ceramics
Alethea Liens, Michael Swain, Helen Reveron, Jerome Cavoret, Philippe Sainsot, Nicolas Courtois, Damien Fabregue, Jerome Chevalier
Summary: The study focused on transformation-induced plasticity in a ceria-stabilized-zirconia based composite, specifically looking at nucleation and growth of tetragonal-to-monoclinic transformation bands. The results showed that the spacing between the bands was influenced by the sample's thickness, with thicker samples leading to a smaller number of larger/deeper bands. Residual stresses around indentations on the tensile surface triggered band nucleation, but did not significantly affect the total number of bands in the end. A stress shielding model suggests that wider bands hinder the propagation of adjacent thinner bands due to stress shielding effects.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Engineering, Electrical & Electronic
Ivan D. Rukhlenko, Roman E. Noskov, Simon Fleming, Deepak Jain
Summary: The thermal fiber drawing technique efficiently produces optical fiber tapers that gradually transition between multi-mode and single-mode operation. By analyzing drawing speed, acceleration, and time, optimal fabrication parameters for different adiabatic shapes of fiber tapers can be determined to minimize pulling force and enhance efficiency.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Deepak Jain, Mark George, Brendan Harris, Simon Fleming
Summary: Researchers developed an intuitive understanding of the properties and guiding mechanisms of M-type fibers, and introduced an approximate expression for the V-parameter to predict the modal-cutoffs for these fibers. This work highlights the potential of M-type fibers for various novel applications including tailoring transmission spectra, reducing effective area for nonlinear applications, and implementing all-fiber filters.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Dentistry, Oral Surgery & Medicine
Pimduen Rungsiyakull, Kallaya Kujarearntaworn, Pathawee Khongkhunthian, Michael Swain, Chaiy Rungsiyakull
Summary: The study found that the location of mini-dental implants has an impact on strain distribution, with mesially placed implants showing reduced strains at the tooth abutment. Distally placed implants resulted in the lowest strains around the implants themselves. This suggests that mini-implants can be a helpful option for mandibular distal extension removable partial dentures in different periodontal conditions.
INTERNATIONAL JOURNAL OF DENTISTRY
(2021)