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 acoustic emission characteristics of micro-failure processes in HDPE/PP blends with and without compatibilizer, single-fibre composites (glass/epoxy, carbon/EPoxy, glass/polycarbonate) and unidirectionally reinforced multi-fiberre composite (glass polypropylene) were studied.
190 citations
TL;DR: Monitoring of cutting tool wear based on time series analysis of acoustic emission signals suggests that tool wear detection can be achieved by monitoring the evolution of the model parameter vector during machining processes.
Abstract: :This paper discusses th.e monitoring of cutting tool wear based on time series analysis of acoustic emission signals. In cutting operations, acoustic emission provides useful information concerning the tool wear condition because of the fundamental dif ferences between its source mechanisms in the rubbing friction on the wear land and the dislocation action in the shear zones. In this study, a signal processing scheme is developed which uses an autoregressive time-series to model the acoustic emission generated during cutting. The modeling scheme is implemented with a stochastic gradient algorithm to update the model parameters adaptively and is thus a suitable candidate for in-process sensing applications. This technique encodes the acoustic emission signal features into a time varying model parameter vector. Ex periments indicate that the parameter vector ignores the change of cutting param eters, but shows a strong sensitivity to the progress of cutting tool wear. This result suggests that tool wear detection can be achieved by monitoring the evolution of the model parameter vector during machining processes.
189 citations
TL;DR: In this paper, the authors present results of acoustic emission studies on flawed and unflawed specimens of aluminum and beryllium and show that acoustic emission from the flawed specimens is found to begin at stress levels far below the general yield stress.
189 citations
TL;DR: In this paper, a single carbon-fiber composite based on a polyester matrix, has been used as a simple model for the analysis of failure modes in composite materials by means of acoustic emission techniques.
188 citations
TL;DR: A series of rock tests including Brazilian indirect tension test (BITT), three-point bending test (TPBT), modified shear test (MST), and uniaxial compression test (UCT) were conducted to investigate the acoustic emission (AE) characteristics and crack classification during rock fracture.
185 citations