Results 11 to 20 of about 68,049 (303)

Viscoelastic Evaluation of Composite Materials by Non-Contact Air Coupled Ultrasonic Transmission Method

open access: yesIEEE Access, 2021
The viscoelasticity of composite materials is one of the important mechanical properties to characterize the intrinsic damping mechanism, which is a crucial evaluation index for the safety performance of materials.
Junjie Chang   +4 more
doaj   +1 more source

Sub-Region Warranty Differential Pricing Optimization Strategy Based on Regional Granularity of Use Reliability

open access: yesIEEE Access, 2020
Despite the various advantages of existing warranty designs, these designs are still limited to inherent reliability and ignore the interaction between use reliability and regional difference. A new sub-region warranty differential pricing strategy based
Lilin Jie   +3 more
doaj   +1 more source

Intelligent recognition of acoustic emission signals from damage of glass fiber-reinforced plastics

open access: yesAdvanced Composites Letters, 2020
Glass fiber-reinforced plastics (GFRP) is widely used in many industrial fields. When acoustic emission (AE) technology is applied for dynamic monitoring, the interfering signals often affect the damage evaluation results, which significantly influences ...
Qiufeng Li   +5 more
doaj   +1 more source

Characterization of Ancient Marquetry Using Different Non-Destructive Testing Techniques

open access: yesApplied Sciences, 2021
Non-destructive testing of objects and structures is a valuable tool, especially in cultural heritage where the preservation of the inspected sample is of vital importance.
Henrique Fernandes   +7 more
doaj   +1 more source

Ultrasonic Sampling Phased Array Testing as a Replacement for X-ray Testing of Weld Joints in Ship Construction [PDF]

open access: yesTransNav, 2012
According to European Standard EN 1712 ultrasonic testing of thin-walled welded joints is mandatory for wall thicknesses of more than 8 mm only. Any thinner components do have to undergo X-ray inspection. Besides various advantages of X-ray testing viz.
Andrey Bulavinov   +3 more
doaj  

Time domain self-bending photonic hook beam based on freezing water droplet

open access: yesScientific Reports, 2023
Tunable optical devices are of great interest as they offer adjustability to their functions. Temporal optics is a fast-evolving field, which may be useful both for revolutionizing basic research of time-dependent phenomena and for developing full ...
Oleg V. Minin   +2 more
doaj   +1 more source

Research on frequency domain synthetic aperture focusing pipeline guided wave imaging based on phase migration

open access: yesAIP Advances, 2021
In order to overcome the limitations of traditional ultrasonic imaging methods, which cannot directly give the imaging results of defects in a pipeline and have low imaging quality, a frequency domain synthetic aperture focusing pipeline imaging method ...
Wenwu Deng   +4 more
doaj   +1 more source

Efficient Detection of Defective Parts with Acoustic Resonance Testing Using Synthetic Training Data

open access: yesApplied Sciences, 2022
Analyzing eigenfrequencies by acoustic resonance testing enables a fast screening of components regarding structural defects. The eigenfrequencies of each specific part depend on the general geometric and material properties, including tolerable part-to ...
Matthias Heinrich   +2 more
doaj   +1 more source

STDC‐Flow: large displacement flow field estimation using similarity transformation‐based dense correspondence

open access: yesIET Computer Vision, 2020
In order to improve the accuracy and robustness of optical flow computation under large displacements and motion occlusions, the authors present in this study a large displacement flow field estimation approach using similarity transformation‐based dense
Congxuan Zhang   +5 more
doaj   +1 more source

Imaging of vertical surface-breaking cracks in concrete members using ultrasonic shear wave tomography

open access: yesScientific Reports, 2023
Surface-breaking cracks in concrete pose a significant threat to the durability of built structures. They create pathways for an accelerated moisture intrusion, and the transport of environmental and chemical agents such as chloride ions, which in turn ...
Sai Teja Kuchipudi   +4 more
doaj   +1 more source

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