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 article, the authors investigated the feasibility of in-service monitoring of the structural health of wind turbine blades by acoustic emission (AE) monitoring, which was performed over periods which totalled 21 days, during which AE monitoring was performed with a 4 sensor array.
87 citations
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TL;DR: In this paper, an acoustic emission (AE) sensor and a piezoelectric dynamometer were used to monitor the diamond-ground optical glasses to correlate the processing characteristics with the generated surface and subsurface integrities, which were characterized by atomic force microscope (AFM), scanning electronic microscope (SEM), and nanoindentation technique.
Abstract: In order to investigate the surface and subsurface integrity of diamond-ground optical glasses, a Tetraform ‘C’ machine tool featuring high close-loop stiffness was used to conduct the ultra-precision machining of fused silica and fused quartz assisted with electrolytic in-process dressing (ELID). An acoustic emission (AE) sensor and a piezoelectric dynamometer were used to monitor the grinding process to correlate the processing characteristics with the generated surface and subsurface integrities, which were characterized by atomic force microscope (AFM), scanning electronic microscope (SEM), and nano-indentation technique. Experimental results showed that for optical glasses the fracture toughness value can be used to predict the machinability while its bigger value always means a better surface and subsurface integrity. During the grinding process of optical glasses, the smaller amplitude and RMS values of AE signal, as well as the smaller grinding forces and the ratio of normal force to tangential force, correspond to a better surface and subsurface integrity. With selected machining parameters and a 6–12 μm grain-sized diamond-grinding wheel, nanometric quality surfaces (Ra
87 citations
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TL;DR: In this article, it is shown that metallurgical variables greatly affect the acoustic emission response of metals, and simple models to account for this are discussed, however, the limitations of existing acoustic-emission recording instrumentation have enabled only qualitative information to be obtained to date.
Abstract: Acoustic-emission techniques are beginning to be frequently used as a means of detecting and locating deformation and fracture processes in both metallic and non-metallic engineering structures This has happened despite a relatively poor understanding of the basic physical processes involved in the generation, propagation, and detection of acoustic-emission signals, and of the influence in metals of factors such as composition and microstructure, upon the acoustic emission from different types of deformation and fracture processes The measurement of acoustic emission, potentially, could yield much information about dynamic aspects of these processes However, it is shown that the limitations of existing acoustic-emission recording instrumentation have enabled only qualitative information to be obtained to date Even this data, however, has demonstrated that metallurgical variables greatly affect the acousticemission response of metals, and simple models to account for this are discussed
87 citations
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TL;DR: In this article, a comprehensive review of acoustic emission produced during plastic deformation by dislocation motion, inclusion fracture and decohesion, as well as unstable crack propagation was performed on pressure vessel steels.
87 citations
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TL;DR: A micro-cracking monitoring and fracture evaluation method for crumb rubber concrete based on the acoustic emission technique was developed in this paper, where the precursory microcracking activity and fracture was investigated.
Abstract: A micro-cracking monitoring and fracture evaluation method for crumb rubber concrete based on the acoustic emission technique was developed. The precursory micro-cracking activity and fracture beha...
87 citations