Results 31 to 40 of about 8,799 (301)

Hybrid Coded Excitation of the Torsional Guided Wave Mode T(0,1) for Oil and Gas Pipeline Inspection

Applied Sciences, 2022
Ultrasonic guided wave testing is an essential technique in non-destructive testing for structural integrity of oil and gas pipelines. This technique, based on the pulse-echo method, is often used for the long-range detection of pipelines at any location.
Zeng Fan, Xudong Niu, Baichun Miao, Hongying Meng   +3 more
doaj   +1 more source

On the development and testing of a guided ultrasonic wave array for structural integrity monitoring

, 2006
The prototype of a guided ultrasonic wave array for the structural integrity monitoring of large, plate-like structures has been designed, built, and tested.
Wilcox, PD, Fromme, P, Cawley, P, Canvley, P, Lowe, MJS   +4 more
core   +1 more source

Detection of cracks in metal sheets using pulsed laser generated ultrasound and EMAT detection [PDF]

, 2011
A pulsed Nd: YAG laser with an approximately Gaussian beam shape is directed onto the surface of an aluminium sheet at an energy density below which damage by laser ablation occurs, generating Lamb waves in the sheet.
Dixon, S., Burrows, S. E. (Susan E.), Dutton, B. (Ben), Fan, Yichao   +3 more
core   +1 more source

Assessing Damages in Pipes through Circular Distribution of Ultrasonic Guided Wave Reflections from Defects

Chemical Engineering Transactions, 2016
Damages in pipes such as cracks and corrosions may threaten the integrity of pipeline. Using ultrasonic guided waves to detect these defects is efficient. The waves propagate in the pipe wall and carry information of the entire structure.
X.X. Li, S.Q. Zhou
doaj   +1 more source

Acoustic Devices for Particle and Cell Manipulation and Sensing [PDF]

, 2014
An emerging demand for the precise manipulation of cells and particles for applications in cell biology and analytical chemistry has driven rapid development of ultrasonic manipulation technology.
Hughes, David, Sylvia Gebhardt, Poltarjonoks, Romans, Sandy Cochran, David A. Hughes, Cochran, Sandy, Aleksandrs Bolhovitins, Gebhardt, Sylvia, Han Wang, Romans Poltarjonoks, Martyn Hill, Schönecker, Andreas, Peter Glynne-Jones, Christine Demore, Christine E. M. Demore, Weijer, Kees; id_orcid, Kees Weijer, Hill, Martyn, Hughes, David A., Glynne-Jones, Peter, Demore, Christine E. M., Bolhovitins, Aleksandrs, Yongqiang Qiu, Demore, Christine, David Hughes, Andreas Schönecker, Qiu, Yongqiang, Wang, Han, Weijer, Kees   +28 more
core   +1 more source

Simulation of ultrasonic lamb wave generation, propagation and detection for an air coupled robotic scanner

, 2011
A computer simulator, to facilitate the design and assessment of a reconfigurable, air-coupled ultrasonic scanner is described and evaluated. The specific scanning system comprises a team of remote sensing agents, in the form of miniature robotic ...
Keith Worden, Walter Galbraith, Burnham, Kenneth, Hayward, Gordon, S. Gareth Pierce, Gordon Hayward, Worden, Keith, Galbraith, Walter, Spencer, Andrew, Dobie, Gordon, Pierce, S. Gareth, Gordon Dobie, Andrew Spencer, Kenneth Burnham   +13 more
core   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

A Comparative Study on the Accuracy and Resolution of DAS and DORT-MUSIC Damage Imaging Method Based on Ultrasonic Guided Waves

Applied Sciences
The ultrasonic guided wave-based damage imaging methods are often limited in detection accuracy and resolution due to the dispersive characteristics of guided waves.
Chenguang Xu, Ying Luo, Guidong Xu, Sai Zhang, Baiqiang Xu   +4 more
doaj   +1 more source

Study on Defect Monitoring of Buried Pipelines Based on Piezoelectric Ceramic Transducer

Shiyou jixie, 2022
In order to monitor the defects in buried pipelines accurately,the piezoelectric ceramic transducer was applied to excite longitudinal mode ultrasonic guided waves in buried pipelines.In this paper,the propagation of ultrasonic guided waves in buried ...
Xu Yang, Luo Mingzhang, Du Guofeng
doaj  

Numerical Study on Ultrasonic Guided Waves for the Inspection of Polygonal Drill Pipes

Sensors, 2019
The polygonal drill pipe is one of the most critical yet weakest part in a high-torque drill machine. The inspection of a polygonal drill pipe to avoid its failure and thus to ensure safe operation of the drilling machine is of great importance. However,
Xiang Wan, Xuhui Zhang, Hongwei Fan, Peter W. Tse, Ming Dong, Hongwei Ma   +5 more
doaj   +1 more source