Publication detail

Acoustic emission localization in thin multi-layer plates using first-arrival determination

SEDLÁK, P. HIROSE, Y. ENOKI, M.

Original Title

Acoustic emission localization in thin multi-layer plates using first-arrival determination

Type

journal article in Web of Science

Language

English

Original Abstract

In the case of thin plates, there exist two modes of propagation which travel at different velocities and exhibit dispersion characteristics. Techniques that are based on Gabor wavelet transform or cross-correlation technique are commonly used to locate acoustic emission (AE) events which occur in large plates. Due to side-edge reflections and short source-to-sensor distances, these techniques are not suitable for small plate-like specimens. If the thickness of the plate-like specimen is smaller than a specific value, the first-coming (extensional) mode will show non-dispersive behavior in AE frequency range. Under such a condition, the conventional localization method can be used for detecting first-arrival times on non-dispersive extensional mode. In previous paper, authors of the paper developed a first-arrival automatic determination technique based on Akaike information criterion (AIC) for thin metal plates. This paper compares this technique with another AIC approach, STA/LTA method (short-term average/long-term average) and a standard threshold-crossing technique. The comparative analysis includes blind tests, and is provided on four datasets recorded by a four-channel recording system. The three of four datasets were generated using two types of artificial AE sources (Hsu-Nielson source and laser impulse), while the fourth one contains real-measurement data. Each dataset corresponds to measurement made on a thin-plate specimen of a different material or geometry.

Keywords

arrival time, acoustic emission, localization, Akaike information criterion, thin plate

Authors

SEDLÁK, P.; HIROSE, Y.; ENOKI, M.

RIV year

2013

Released

3. 2. 2013

Publisher

Elsevier

ISBN

0888-3270

Periodical

MECHANICAL SYSTEMS AND SIGNAL PROCESSING

Year of study

36

Number

2

State

United Kingdom of Great Britain and Northern Ireland

Pages from

636

Pages to

649

Pages count

14

BibTex

@article{BUT99181,
  author="Petr {Sedlák} and Yuichiro {Hirose} and Manabu {Enoki}",
  title="Acoustic emission localization in thin multi-layer plates using first-arrival determination",
  journal="MECHANICAL SYSTEMS AND SIGNAL PROCESSING",
  year="2013",
  volume="36",
  number="2",
  pages="636--649",
  doi="10.1016/j.ymssp.2012.11.008",
  issn="0888-3270"
}