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, quantitative acoustic emission techniques were used to measure microfracture properties in an array of cement-based materials of varying microstructure, and microcracks were modeled using a seismic moment tensor, which could be estimated through deconvolution of the measured acoustic emission waveforms.
106 citations
TL;DR: In this article, the quality of the machined surface after broaching and the output signals obtained from multiple sensors, namely acoustic emission, vibration, and cutting forces, were estimated in terms of geometrical accuracy, burr formation, chatter marks and surface anomalies.
Abstract: The paper reports on research which attempts to correlate the quality of the machined surface after broaching and the output signals obtained from multiple sensors, namely acoustic emission, vibration, and cutting forces. The quality of the machined surface was estimated in terms of geometrical accuracy, burr formation, chatter marks and surface anomalies. Cutting conditions were varied based on an orthogonal array with cutting speed, coolant conditions, and tool settings as factors. Each orthogonal array was repeated at three levels of the tool wear. The results show that the cutting force signals are sensitive enough to detect the geometrical deviation of the machined profile, burr formation and to a lesser extent the chatter marks. The vibration signals were found sensitive to detect the chatter marks while the acoustic emission signal proved to be efficient for the detection of small surface anomalies such as pluckings, laps, and smeared material. However, up to now, no clear distinction between the different types of the surface anomalies could be made using the analysis of the acoustic emission signal. Time and frequency domain analysis of the output signals were carried out in order to develop appropriate techniques for qualitative/quantitative evaluation of the machined surface quality. It was found that each sensory signal is rather limited to a narrow field of application where certain surface features are detectable. The limitations of the employed sensory signals/analysis methodologies used to assess the workpiece surface quality, and their applicability in the industrial machining conditions are also discussed.
105 citations
TL;DR: In this paper, the structural stability of three medieval towers, Torre Sineo (Torre Astesiano), Torre Bonino and Torre Staro, was investigated.
105 citations
TL;DR: In this paper, the use of the acoustic emission technique to monitor fatigue crack propagation in steel compact tension specimens and T-section girders is described, based on correlations between crack propagation rates, acoustic emission count rates and stress intensity factor range procedures are suggested for predicting remaining fatigue life.
105 citations
TL;DR: In this article, the authors used the wavelet transform and modal acoustic emission to analyse the propagation of elastic waves in thin plates, and they demonstrated the feasibility of the one sensor linear location scheme.
105 citations