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Acoustic Emission Sensing of Materials and Structures

Authors:
Irinela Chilibon

Keywords: Acoustic Emission (AE); Acoustic Emission technique (AET); non-destructive testing (NDT); Structural Health Monitoring (SHM).

Abstract:
Acoustic Emission (AE) sensing is used in the field for the testing of metal and composite, as non-destructive techniques. The AE technique allows to determine the size of the cracks, damages, fractures and failures into materials. Possible causes of the internal-structure changes are crack initiation and growth, crack opening and closure, dislocation movement, twinning, and phase transformation in monolithic materials and fibre breakage and fibre-matrix debonding in composites. Most of the sources of AEs are damage-related to the detection of these emissions. AE technology involves the use of ultrasonic transducers (20 kHz - 1 MHz) to listen for the sounds of failure occurring in materials and structures. The experimental works can determine practical information concerning the AE response of different materials and structures at mechanical strength and predict their behaviour and maximum strengths. As novelty, monitoring the stability of important construction structures, by AE technique makes possible to detect the onset and evolution of stress-induced cracks and prevent the structural failures.

Pages: 32 to 37

Copyright: Copyright (c) IARIA, 2022

Publication date: October 16, 2022

Published in: conference

ISSN: 2308-3514

ISBN: 978-1-68558-006-3

Location: Lisbon, Portugal

Dates: from October 16, 2022 to October 20, 2022