Results 21 to 30 of about 15,824 (291)
Ultrasonic Wave Mixing for Nonlinear Ultrasonics in a Microfluidic Capillary [PDF]
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.
DemĨenko, Andriejus +3 more
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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
doaj +1 more source
Defects Inspection in Wires by Nonlinear Ultrasonic-Guided Wave Generated by Electromagnetic Sensors
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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Nonlinear aspects of ultrasonic heating [PDF]
Under appropriate conditions, the absorption of finite amplitude ultrasound is determined largely by source amplitude, field geometry, and the nonlinear properties of the medium and is only weakly dependent upon the small signal absorption coefficient of the material.
E. L. Carstensen +4 more
openaire +1 more source
Second Harmonic Modulation for Ultrasonic Signals Based on the Design of the Phononic Crystal Filter
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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Cast austenitic stainless steel (CASS) is used for fabricating different components of the primary reactor coolant system of pressurized water reactors.
Jongbeom Kim +6 more
doaj +1 more source
Ultrasonic resonance of defects for nonlinear acoustic imaging and NDT [PDF]
The effect of local defect resonance (LDR) on the nonlinear ultrasonic response of defects is studied and applied for enhancement of sensitivity of nonlinear ultrasonic ...
Igor Solodov
core +1 more source
A local defect resonance for linear and nonlinear ultrasonic thermography [PDF]
An efficient wave-defect interaction is the key to a high thermal response of flaws in ultrasonic thermography. To selectively enhance defect vibrations a concept of local defect resonance is developed and applied to ultrasonic activation of defects ...
Solodov, I., Rahammer, M., Busse, G.
core +1 more source
This paper presents the study of applying the nonlinear ultrasonic wave to evaluate the stress state of metallic materials under steady state. The pre-stress loading method is applied to guarantee components with steady stress.
Hanling Mao +4 more
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In Situ Fatigue Damage Monitoring by Means of Nonlinear Ultrasonic Measurements
In the present work, the results of acoustic nonlinear response of ultrasonic wave propagation when monitoring the progress of damage induced by fatigue on notched C45 carbon steel specimens have been reported.
Andrea Saponaro, Riccardo Nobile
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