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Acoustic Emission Sensing of Structures

Authors:
Irinela Chilibon
Marian Mogildea
George Mogildea

Keywords: acoustic emission; AE; sensor

Abstract:
This paper presents some experimental results concerning the acoustic emission (AE) of different material structures, submissive at mechanical tests. Acoustic emission signals were prevailed by AE sensor, fixed on the material surface by an electroacoustic material. The AE piezoelectric sensor realizes the mechanical to electrical energy conversion, and the output signal is displayed on the memory digital oscilloscope. By signal analysis in time and frequency one can get the attenuation coefficients, delaminating, voids, defects, into material, revealing important information about the material structure behavior at mechanical stresses. Also, we can determine the moments when the material could be cracked or irreversibly deteriorated. Therefore, one can detect the maximum acoustic emissions and predict the material failure. Experimental works provided information concerning the AE response of different type of materials (aluminum, brass and concrete) under mechanical strengths, in order to predict their behavior at maximum strengths. The information could be applied for complex construction structures, in order to prevent their breaking risks.

Pages: 123 to 128

Copyright: Copyright (c) IARIA, 2011

Publication date: August 21, 2011

Published in: conference

ISSN: 2308-3514

ISBN: 978-1-61208-145-8

Location: Nice/Saint Laurent du Var, France

Dates: from August 21, 2011 to August 27, 2011