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Vol. 14-1, Special Issue, March 2012, pp.122-133

 

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Acoustic Emission Sensing of Structures under Stretch

 

1 Irinela CHILIBON, 2 Marian MOGILDEA, 2 George MOGILDEA

1 National Institute of Research and Development for Optoelectronics, INOE-2000,

409 Atomistilor Str., P.O. MG-5, code 77125, Bucharest-Magurele, Romania

2 Institute of Space Sciences, ISS, 409 Atomistilor Str., Bucharest-Magurele, Romania

E-mail: qilib@yahoo.com, marian_mogildea@yahoo.com, georgemogildea@yahoo.com

 

 

Received: 14 November 2011   /Accepted: 20 December 2011   /Published: 12 March 2012

Digital Sensors and Sensor Sysstems

 

Abstract: This paper presents some experimental results concerning the acoustic emission (AE) of different structures under stretches, in order to predict their behaviour at maximum extent efforts. Acoustic emission signals are prevailed by sensitive 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 behaviour at mechanical stresses. The information could be applied for complex construction structures, in order to prevent their breaking risks.

 

Keywords: Acoustic emission, AE, Sensor, MEMS

 

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