Results 21 to 30 of about 63,920 (326)
Venting in the comparative study of flexural ultrasonic transducers to improve resilience at elevated environmental pressure levels [PDF]
, 2020 The classical form of a flexural ultrasonic transducer is a piezoelectric ceramic disc bonded to a circular metallic membrane. This ceramic induces vibration modes of the membrane for the generation and detection of ultrasound.
Dixon, Steve M. +3 more
core +2 more sources
A Nonlinear Ultrasonic Modulation Method for Crack Detection in Turbine Blades
Aerospace, 2020 In modern gas turbines, efforts are being made to improve efficiency even further. This is achieved primarily by increasing the generated pressure ratio in the compressor and by increasing the turbine inlet temperature.
Frank Mevissen, Michele Meo
doaj +1 more source
Theoretical prediction of the scattering of spherical bubble clusters under ultrasonic excitation
Ultrasonics Sonochemistry, 2023 Due to the nonlinear vibration of ultrasound contrast agent bubbles, a nonlinear scattered sound field will be generated when bubbles are driven by ultrasound. A bubble cluster consists of numerous bubbles gathering in a spherical space.
Xin Xu, Menyang Gong, Xiaozhou Liu
doaj +1 more source
Shock and Vibration, 2023 This paper presents the development of a numerical model able to track in time the behavior of nonlinear focused ultrasound when interacting with tiny gas bubbles in a liquid.
María Teresa Tejedor Sastre +3 more
doaj +1 more source
Simulation of Three Constitutive Behaviors Based on Nonlinear Ultrasound
Applied Sciences, 2020 Nonlinear ultrasound has attracted more and more attention. In classical acoustic nonlinear theory, the source of nonlinearity is the change of constitutive relation of materials.
Zaifu Zhan +5 more
doaj +1 more source
Modelling Nonlinear Ultrasound Propagation in Bone
AIP Conference Proceedings, 2006 Simulations have been carried out to assess the possibility for detecting the nonlinear properties of bone in vivo. We employed a time domain solution to the KZK equation to determine the nonlinear field generated by an unfocussed circular transducer in both cancellous and cortical bone.
Cleveland, R +5 more
openaire +2 more sources
Modal analysis and nonlinear characterization of an airborne power ultrasonic transducer with rectangular plate radiator [PDF]
, 2018 Some industrial processes like particle agglomeration or food dehydration among others can be enhanced by the use of power ultrasonic technologies.
Acosta, V.M. +3 more
core +1 more source
International Journal of Hyperthermia, 2019 Purpose: A real-time noninvasive thermometry technique is required to estimate the temperature distribution during hyperthermia to monitor and control the treatment.
Borna Maraghechi +2 more
doaj +1 more source
Cailiao gongcheng, 2017 The variation law of nonlinear ultrasonic parameters for the samples sensitized at 650℃ for 2, 6, 10h was discussed using nonlinear ultrasonic testing technique and XRD pattern as well as microstructure.
HOU Tian-yu +4 more
doaj +1 more source
Assessment of Material Dislocation Damage by Nonlinear Ultrasound [PDF]
MATEC Web of Conferences, 2020 Under harsh environment or during service, the mechanical properties of materials or structure will deteriorate. Most of the simulations exhibit the phenomenon of nonlinearity by introducing the actual small defects, without considering dislocation.
Zhan Zaifu +5 more
doaj +1 more source