Results 61 to 70 of about 10,739 (209)
The use of fibre Bragg gratings for ultrasonic Lamb wave detection and source location [PDF]
, 2006 There is an increasing interest in the use of ultrasonic Lamb waves for materials characterisation and the detection of structural defects. Fibre Bragg gratings offer some significant advantages over more traditional transducers such as piezoelectrics ...
Thursby, G.J.
core +1 more source
Acoustic transmission enhancement through a periodically-structured stiff plate without any opening
, 2011 We report both experimentally and theoretically that the enhanced acoustic transmission can occur in the subwavelength region through a thin but stiff structured-plate without any opening.
Chunyin Qiu +9 more
core +2 more sources
ProceedingsHeat spots caused by standing waves in an inspected object can pose practical challenges in nondestructive inspection using ultrasonic excitation thermography.
Masashi Ishikawa +3 more
doaj +1 more source
Applied Sciences, 2019 Ultrasonic Lamb wave testing has been successfully applied in nondestructive testing. However, because of Lamb wave multimodal and dispersion characteristics, the received signals are often multimodal and overlapping, which makes them very complicated ...
Xiao Chen, Dandan Ma
doaj +1 more source
Ultrasonic gas flow metering in hydrogen-mixed natural gas using Lamb waves
AIP Advances, 2023 Hydrogen mixing in existing natural gas pipelines efficiently achieves large-scale, long-distance, and low-cost hydrogen delivery. The physical properties of hydrogen and natural gas differ significantly.
Shouhu Ji +5 more
doaj +1 more source
High Frequency Ultrasonic Measurements
Measurement + Control, 1988 The use of high frequency ultrasonic Lamb waves to measure the thickness of thin plates and foils, is discussed and the feasibility of their application to the determination of the degree of cure of polymer coating on coated tin plated steel sheet (as ...
N Zarsav
doaj +1 more source
Flow estimation in a steel pipe using guided waves [PDF]
, 2016 In this investigation, a flow rate estimation guided wave based scheme in pipes is proposed. The effect of the fluid over the propagation of longitudinal waves has been experimentally studied by using several laminar flows of water transported by a ...
Mujica Delgado, Luis Eduardo +4 more
core +3 more sources
Influence of wall thickness and diameter on arterial shear wave elastography: a phantom and finite element study [PDF]
, 2017 Quantitative, non-invasive and local measurements of arterial mechanical properties could be highly beneficial for early diagnosis of cardiovascular disease and follow up of treatment.
Bini, Fabiano +6 more
core +1 more source
Non-linear enhancement of laser generated ultrasonic Rayleigh waves by cracks [PDF]
, 2008 Laser generated ultrasound has been widely used for detecting cracks, surface and sub-surface defects in many different materials. It provides a non-contact wideband excitation source which can be focused into different geometries.
Cann, B. +4 more
core +1 more source
Fully Noncontact Wave Propagation Imaging in an Immersed Metallic Plate with a Crack
Shock and Vibration, 2014 This study presents a noncontact sensing technique with ultrasonic wave propagation imaging algorithm, for damage visualization of liquid-immersed structures. An aluminum plate specimen (400 mm × 400 mm × 3 mm) with a 12 mm slit was immersed in water and
Jung-Ryul Lee +2 more
doaj +1 more source