Results 1 to 10 of about 514,588 (251)

Laser Ultrasound Inspection Based on Wavelet Transform and Data Clustering for Defect Estimation in Metallic Samples [PDF]

Sensors, 2019
Laser-generated ultrasound is a modern non-destructive testing technique. It has been investigated over recent years as an alternative to classical ultrasonic methods, mainly in industrial maintenance and quality control procedures.
Hossam Selim, Miguel Delgado Prieto, José Trull, Luis Romeral, Crina Cojocaru   +4 more
doaj   +4 more sources

Accuracy Assessment of Ultrasonic C-scan and X-ray Radiography Methods for Impact Damage Detection in Glass Fiber Reinforced Polyester Composites [PDF]

Journal of Applied and Computational Mechanics, 2019
The present study introduces two quantitative parameters to compare the accuracy of ultrasonic C-scan testing and X-ray radiography methods in the damaged area detection under low-velocity impact in polymer-based composites.
Seyyed Abbas Arhamnamazi, Nasrollah Bani Mostafa Arab, Amir Refahi Oskouei, Francesco Aymerich   +3 more
doaj   +2 more sources

Engineering-Oriented Ultrasonic Decoding: An End-to-End Deep Learning Framework for Metal Grain Size Distribution Characterization [PDF]

Sensors
Grain size is critical for metallic material performance, yet conventional ultrasonic methods rely on strong model assumptions and exhibit limited adaptability. We propose a deep learning architecture that uses multimodal ultrasonic features with spatial
Le Dai, Shiyuan Zhou, Yuhan Cheng, Lin Wang, Yuxuan Zhang, Heng Zhi   +5 more
doaj   +2 more sources

Ultrasonic Tomography Study of Metal Defect Detection in Lithium-Ion Battery

Frontiers in Energy Research, 2021
Lithium-ion batteries are widely used in electric vehicles and energy storage systems. Sudden fire accident is one of the most serious issue, which is mainly caused by unpredicted internal short circuit.
Mengchao Yi, Mengchao Yi, Fachao Jiang, Languang Lu, Sixuan Hou, Jianqiao Ren, Xuebing Han, Lili Huang   +7 more
doaj   +2 more sources

Defect Detection in Wood Using Air-Coupled Ultrasonic Technique Based on Golay Code [PDF]

Sensors
Air-coupled ultrasound overcomes the limitations of traditional contact-based ultrasonic methods that rely on liquid couplants. Still, it faces challenges due to the acoustic impedance mismatch between air and wood, causing significant signal scattering ...
Jun Wang, Tianyou Xu, Hongyan Zou
doaj   +2 more sources

Extraction of Flaw Signals from the Mixed 1-D Signals by Denoising Autoencoder

Applied Sciences, 2023
Ultrasonic testing (UT) is one of the most popular non-destructive evaluation (NDE) techniques used in many industries to evaluate structural integrity.
Seung-Eun Lee, Jinhyun Park, Hak-Joon Kim, Sung-Jin Song   +3 more
doaj   +1 more source

Multi-mode ultrasonic visualization of porosity in composites using a focused transducer with high sensitivity and near-surface resolution

Composites Part C: Open Access, 2021
Porosity ranging from 0.15% to 2.33% in carbon fiber-reinforced polymer composites (CFRPs) is detected and characterized by multi-mode visualizations including ultrasonic A-Scan, B-Scan, C-Scan and Tomography-Scan using a focused ultrasonic transducer ...
Junwei Shi, Songping Liu, Feifei Liu, Guoli Xun   +3 more
doaj   +1 more source

Detectable Depth of Copper, Steel, and Aluminum Alloy Plates with Pulse-Echo Laser Ultrasonic Propagation Imaging System

Metals, 2021
Pulse-echo laser ultrasonic propagation imaging is a nondestructive testing technique developed for composite materials and aluminum alloys used in aerospace.
Dong-Il Kim, Ku-Rak Jung, Yoon-Soo Jung, Jae-Yeol Kim   +3 more
doaj   +1 more source

Comparison of X-ray Computed Tomography and Ultrasonic C-Scan Techniques and Numerical Modelling of Impact Damage in a CFRP Composite Laminate

Applied Composite Materials, 2023
Two different experimental techniques are employed to visualize the impact damage generated by a low-velocity impact on a carbon-fibre reinforced-polymer (CFRP) composite laminate. At the relatively low impact-velocity of 1.69 m.s^−1, and a corresponding
E. Evans, R. Brooks, J. Liu, Z. Hall, H. Liu, T. Lowe, P. Withers, A. Kinloch, J. Dear   +8 more
semanticscholar   +1 more source

Phased Array Ultrasonic Sector Scan Imaging of Helicopter Damper Bolts Based on Vector Coherence Factor

Applied Sciences, 2022
Non-destructive testing of the cracks on the in-service bolt’s shank with size M18 is a challenging technical problem. Due to the weak echo energy of cracks with large buried depths, the conventional phased array ultrasonic sector scan imaging has a low ...
Jingxing Huang, Ming Chen, Qingru Kong, Liangzhong Xiao, Chao Lu, Yao Chen   +5 more
doaj   +1 more source