Topic
Acoustic emission
About: Acoustic emission is a research topic. Over the lifetime, 16293 publications have been published within this topic receiving 211456 citations.
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TL;DR: In this paper, the influence of cyclic mining stress on gas-containing coal seams during mining, the seepage properties, acoustic emission (AE) characteristics and energy dissipation of coal under tiered cyclic loading were experimentally investigated.
114 citations
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TL;DR: In this paper, an acoustic emission (AE) system was used to study the damage behavior of some Australian black coal samples subjected to uniaxial compression, and the results showed that sorption of CO 2 can cause a reduction in strength of the coal samples when tested under uniaaxial compression.
113 citations
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TL;DR: Numerical calculations show that MT-water system supports interface elastic waves with maximal frequencies in a gigahertz range, and models MTs by thin elastic cylindrical shells derive the eigenfrequencies and eigenmodes of confined elastic vibrations in a shell-fluid system.
Abstract: We study thoreticaly vibrational properties of microtubules (MTs), which are long hollow cylindrical macromolecules with a diameter of the order of 25 nm and serve as a major component of cytoskeleton in eukariotic cells. Modeling MTs by thin elastic cylindrical shells, we derive the eigenfrequencies and eigenmodes of confined elastic vibrations in a shell-fluid system. Numerical calculations, based on recently obtained experimental data for Young's modulus of MT, show that MT-water system supports interface elastic waves with maximal frequencies in a gigahertz range. In a long-wavelength limit, there exist three axisymmetric acoustic waves with velocities of about 200 to 600 m/s, and an infinite set of helical waves with a parabolic dispersion law. \textcopyright{} 1996 The American Physical Society.
113 citations
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30 Aug 1995TL;DR: In this paper, an acoustic rotor monitor that is an autonomous self-powered measurement instrument which can detect embedded and hidden fatigue cracks in remotely inaccessible devices such as helicopter rotor system components is presented.
Abstract: An acoustic rotor monitor that is an autonomous self-powered measurement instrument which can detect embedded and hidden fatigue cracks in remotely inaccessible devices such as helicopter rotor system components. A predictive maintenance-related problem for rotor craft is the detection of fatigue cracks as a continuous real-time monitoring process under dynamic rotor system loading conditions. The rotor monitor focuses on the embedding an acoustic emission-based smart sensor directly into the rotor system to measure the high frequency stress waves indicating that a structural crack has propagated as a "self-powered" measurement without reducing structural integrity.
113 citations
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TL;DR: In this paper, the authors used acoustic emission (AE) to detect and locate the early stages of corrosion and macro-cracks and furthermore classify different crack types to aid maintenance priorities.
113 citations