Results 11 to 20 of about 302,242 (373)
International Journal of Distributed Sensor Networks, 2018 In this article, the acoustic emission tests of uniaxial cyclic load imposed on or released from the sandstone and mudstone were carried out. The deformation and failure characteristics and the law governing the acoustic emission activity were studied ...
Guangming Zhao, Chao Wang, Dongxu Liang
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Including acoustic modes in the vortex-sheet eigenbasis of a jet [PDF]
The Journal of the Acoustical Society of America 151, 852 (2022), 2021 Vortex-sheet models of jets are widely used to describe the dynamics of modes, such as the Kelvin-Helmholtz instability and guided acoustic waves. However, it is seldom pointed out in the literature the absence of the free-stream acoustic modes in the vortex-sheet spectrum.
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Gong-kuang zidonghua, 2016 An information collection system of coal containing gas under uniaxial compression was built, dates' change of acoustic emission and mechanical parameters while coal samples loaded were tested, and damaged evolution model of coal and rock and ...
NIU Yue +7 more
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, 2022 Structural testing and assessment, process monitoring, and material characterization are three broad application areas of acoustic emission (AE) techniques.
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Research of identification of acoustic emission signal of coal and rock
Gong-kuang zidonghua, 2013 In view of problem that it is difficult to identify acoustic emission signal of coal and rock burst under complicated noise environment, the paper proposed an identification method of acoustic emission signal of coal and rock based on wavelet packet and ...
TONG Min-ming +3 more
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Resonant Airborne Acoustic Emission for Nondestructive Testing and Defect Imaging in Composites
Applied Sciences, 2021 A new version of an acoustic emission mode which is different from its traditional counterpart is discussed in view of applications for nondestructive testing.
Igor Solodov +2 more
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General framework for acoustic emission during plastic deformation [PDF]
Physical Review B 92, 144109 (2015), 2017 Despite the long history, so far there is no general theoretical framework for calculating the acoustic emission spectrum accompanying any plastic deformation. We set up a discrete wave equation with plastic strain rate as a source term and include the Rayleigh-dissipation function to represent dissipation accompanying acoustic emission.
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MATEC Web of Conferences, 2017 The acoustic emission phenomenon is directly associated with nucleation of cracks in structural materials during loading. This paper analyses acoustic emission signals captured during three-point bending fracture tests of alkali-activated slag mortar ...
Topolář Libor +3 more
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Study on the tensile properties of sandstone with different water contents under freeze-thaw cycles
Gong-kuang zidonghua, 2023 Mines in cold regions of China are affected by freeze-thaw cycles, resulting in uneven expansion and contraction of rocks, leading to the formation of cracks. At the same time, the expansion of cracks due to water frost heave between cracks leads to rock
MIAO Haodong, REN Fuqiang
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Acoustically regulated optical emission dynamics from quantum dot-like emission centers in GaN/InGaN nanowire heterostructures [PDF]
J. Phys. D: Appl. Phys. 51 (2018) 104001, 2019 We report on experimental studies of the effects induced by surface acoustic waves on the optical emission dynamics of GaN/InGaN nanowire quantum dots. We employ stroboscopic optical excitation with either time-integrated or time-resolved photoluminescence detection. In the absence of the acoustic wave, the emission spectra reveal signatures originated
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