Results 111 to 120 of about 33,469 (308)

Experimental and numerical studies on low velocity impacts detection and damage identification in metal and composite structures using ultrasonic waves propagation (Lamb waves)

, 2011
In this thesis a theoretical base required for the development of a reliable structural health monitoring system based on ultrasonic guided waves is considered.
Tancredi, Simone
core  

Kelvin Probe Force Microscopy in Bionanotechnology: Current Advances and Future Perspectives

Advanced Materials, EarlyView.
Kelvin probe force microscopy (KPFM) enables the nanoscale mapping of electrostatic surface potentials. While widely applied in materials science, its use in biological systems remains emerging. This review presents recent advances in KPFM applied to biological samples and provides a critical perspective on current limitations and future directions for
Ehsan Rahimi, Mario Palacios‐Corella, Arjan Mol, Salvador Pané, Josep Puigmartí‐Luis   +4 more
wiley   +1 more source

Grain refinement and Laves phase dispersion by high-intensity ultrasonic vibration in laser cladding of Inconel 718

Journal of Materials Research and Technology
Laser cladding is a promising surface modification and repair technology for fabricating Inconel 718 parts. However, laser cladding may produce coarse grains and brittle Laves phase, leading to a significant decrease in performance.
Jian Chen, Zhehe Yao, Fabo Wang, Yiming Chi, Zhen Wang, Szymon Tofil, Jianhua Yao   +6 more
doaj   +1 more source

Research on the Micro-Extrusion Process of Copper T2 with Different Ultrasonic Vibration Modes

Metals, 2019
As an effective method for the fabrication of miniature metallic parts, the development of micro-forming process (MFP) is still restricted by the existence of size effect.
Linhong Xu, Yulan Lei, Haiou Zhang, Zhaochen Zhang, Yuchu Sheng, Guangchao Han   +5 more
doaj   +1 more source

Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection

Advanced Materials, EarlyView.
Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel, Haotian Lu, Jiayan Zhang, Desheng Yao, Ananya Bhardwaj, Ramiro Contreras, Karim Sabra, Xiaoyu (Rayne) Zheng   +7 more
wiley   +1 more source

Desenvolvimento e análise preliminar de tecnologia para soldagem SAW com pulsação ultrassônica da corrente [PDF]

, 2015
TCC (graduação) - Universidade Federal de Santa Catarina. Campus Joinville. Engenharia Naval.A soldagem a arco submerso apresenta-se como um processo adequado para a aplicação em grande escala na indústria de construção naval devido à possibilidade de ...
Voigt, Anna Louise
core  

Flexible Dielectric Acoustic Resonator Patch for Tissue Regeneration

Advanced Materials, EarlyView.
A flexible dielectric acoustic resonator patch enables MHz‐range ultrasound generation through resonance amplification without using piezoelectric materials. Conformal integration on a curved substrate allows efficient acoustic delivery to tissue‐mimicking environments.
Donyoung Kang, Byeongseok Ryu, Sujeong Ahn, Junhyub Kim, Myeonghun Jang, Jeong Ho Cho, Won‐Gun Koh, Hyungsuk Lee   +7 more
wiley   +1 more source

Large‐Area 2D Metasurface‐Based Triboelectric E‐Skin Arrays: Contact & Proximity Tactile Mapping with Broadband Acoustic Readouts

Advanced Materials, EarlyView.
Metasurface‐engineered NC‐TENG arrays integrate tactile pressure mapping, non‐contact gesture sensing, and acoustic signal readouts in one ultrathin module, and outperforms pristine PDMS in terms of electrical output and real‐time spatial mapping for next‐gen wearables.
Injamamul Arief, Swagato Sarkar, Anik Kumar Ghosh, Osvalds Verners, Kamal Kumar Meena, Su‐Hyeong Lee, Soosang Chae, Tobias A. F. König, Beate Krause, Andreas Fery, Mehmet Sait Özer, Anindya Nag, Amit Das   +12 more
wiley   +1 more source

Active elastic metamaterials with applications in vibration and acoustics

, 2012
Elastic metamaterials provide a new approach to solving existing problems in vibration and acoustics. They have also been associated with novel concepts such as acoustic invisibility and subwavelength imaging.
Laalej, Hatim, Pope, Simon A., Reynolds, Matthew, Daley, Stephen   +3 more
core  

The Mechanical Properties of Granite under Ultrasonic Vibration

Advances in Civil Engineering, 2019
The new technique of using ultrasonic vibration to break hard rock is still in the experimental stage, but it has significant potential for improving the efficiency of hard rock crushing.
Yu Zhou, Qiongqiong Tang, Shulei Zhang, Dajun Zhao   +3 more
doaj   +1 more source