Results 11 to 20 of about 13,079 (259)
Nonlinear Ultrasonic Phased Array Imaging [PDF]
Physical Review Letters, 2014 This Letter reports a technique for the imaging of acoustic nonlinearity. By contrasting the energy of the diffuse field produced through the focusing of an ultrasonic array by delayed parallel element transmission with that produced by postprocessing of sequential transmission data, acoustic nonlinearity local to the focal point is measured. Spatially
Potter, J. N. +2 more
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Research on Residual Life Estimation Method for KMN Steel Based on Nonlinear Ultrasonic Testing
Applied Sciences, 2021 The testing of KMN steel bending fatigue with different cycles was carried out using a nonlinear ultrasonic detector to obtain its nonlinear coefficient. The experimental results show that the nonlinear coefficient first increases and then decreases with
Pengfei Wang +3 more
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Ultrasonic Nonlinearity Evaluation of the Cracked Interface [PDF]
Mathematical Problems in Engineering, 2016 This paper derives a novel analytical solution for acoustic nonlinearity evaluation of the cracked interface. When microcracks exist at the interface, the tensile and compressive effective moduli of the cracked interface are considered to be different.
Qiu, Yanjun +4 more
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The nonlinear dynamics of flexural ultrasonic transducers [PDF]
Proceedings of Meetings on Acoustics, 2019 Dynamic nonlinearity can manifest as changes in characteristic properties of a vibrating system in response to variations in excitation. This study investigates the nonlinearity in the vibration response of the flexural ultrasonic transducer. This device is typically employed for industrial measurement, but little is known about the influence of ...
Feeney, Andrew +3 more
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Research on Fatigue Damage in High-Strength Steel (FV520B) Using Nonlinear Ultrasonic Testing
Shock and Vibration, 2020 In view of the early fatigue damage of high-strength steel FV520B, a nonlinear ultrasonic detection was performed on two types of fatigue samples using nonlinear Lamb waves.
Bingbing Chen +4 more
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Ultrasonic Wave Mixing for Nonlinear Ultrasonics in a Microfluidic Capillary [PDF]
2019 IEEE International Ultrasonics Symposium (IUS), 2019 In this study we show that nonlinear ultrasonics, based on nonlinear wave mixing, can enable the measurement of the interactions between acoustic waves and a microliter liquid sample in a glass capillary microchannel. This has the potential to deliver new techniques with a high sensitivity to acoustic material properties.
Demčenko, Andriejus +3 more
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Results in Physics, 2023 In order to investigate the fatigue behavior of carbon fiber composites and the influence of different stress levels on their fatigue damage characteristics, the fatigue experiments of carbon fiber composites under different stress ratios are carried out.
Silong Quan, Yuhua Zhang, Peishan Lin
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Characterization of Nonlinear Ultrasonic Diffuse Energy Imaging [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2018 Nonlinear ultrasonic diffuse energy imaging is a highly sensitive method for the measurement of elastic nonlinearity. While the underlying principles that govern the technique are understood, the precise behavior and sensitivity have not previously been quantified. This paper presents experimental, theoretical, and numerical modeling studies undertaken
Jack Potter, Anthony J. Croxford
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Defects Inspection in Wires by Nonlinear Ultrasonic-Guided Wave Generated by Electromagnetic Sensors
Applied Sciences, 2020 Steel wires are widely used as raw materials for spring valves in engines. Considering the quality and safety issues of their structure, there is a demand to develop nondestructive inspection approaches to detect initial damages in steel.
Junpil Park +3 more
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Second Harmonic Modulation for Ultrasonic Signals Based on the Design of the Phononic Crystal Filter
Sensors, 2023 Nonlinear ultrasonic non-destructive testing (NDT) is a widely used method for detecting micro-damages in various materials and structures due to its high sensitivity and directional capability.
Yue Zhu, Youxuan Zhao, Peng Cao
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