Publication detail

Vliv způsobu mechanického zatěžování betonových vzorků na signály elektromagnetické a akustické emise

KOKTAVÝ, B. KOKTAVÝ, P. ŠTEFKOVÁ, M.

Original Title

Vliv způsobu mechanického zatěžování betonových vzorků na signály elektromagnetické a akustické emise

English Title

On the effect of mechanical loading method on rectangular concrete specimen electromagnetic and acoustic emission signals

Type

conference paper

Language

Czech

Original Abstract

The paper deals with the generation of electromagnetic emission (EME) and acoustic emission (AE) response, which results from the load being applied to rectangular concrete specimens in two different ways. In the first case, the specimen is stressed by a plain pressure exerted by the pressing machine jaws on it. In the second case, rectangular steel blocks of a width of 6 mm are inserted between the specimen and the jaws. Typical EME and AE response waveforms appear not to differ from each other for either of the loading methods. However, a significant difference is observed in the frequency distribution of the time lag of the acoustic signal behind the electromagnetic one. This fact results from the difference in the distance between the crack generation point and the AE pickup device location for the two loading methods. This result is in a good agreement with the theoretic model prediction.

English abstract

The paper deals with the generation of electromagnetic emission (EME) and acoustic emission (AE) response, which results from the load being applied to rectangular concrete specimens in two different ways. In the first case, the specimen is stressed by a plain pressure exerted by the pressing machine jaws on it. In the second case, rectangular steel blocks of a width of 6 mm are inserted between the specimen and the jaws. Typical EME and AE response waveforms appear not to differ from each other for either of the loading methods. However, a significant difference is observed in the frequency distribution of the time lag of the acoustic signal behind the electromagnetic one. This fact results from the difference in the distance between the crack generation point and the AE pickup device location for the two loading methods. This result is in a good agreement with the theoretic model prediction.

Keywords

Crack, electric charge, electromagnetic emission, acoustic emission

Key words in English

Crack, electric charge, electromagnetic emission, acoustic emission

Authors

KOKTAVÝ, B.; KOKTAVÝ, P.; ŠTEFKOVÁ, M.

RIV year

2007

Released

25. 10. 2007

Publisher

CERM

Location

Brno, Česká republika

ISBN

978-80-7204-543-3

Book

Experiment 2007

Pages from

211

Pages to

216

Pages count

6

BibTex

@inproceedings{BUT25518,
  author="Bohumil {Koktavý} and Pavel {Koktavý} and Markéta {Štefková}",
  title="Vliv způsobu mechanického zatěžování betonových vzorků na signály elektromagnetické a akustické emise",
  booktitle="Experiment 2007",
  year="2007",
  pages="211--216",
  publisher="CERM",
  address="Brno, Česká republika",
  isbn="978-80-7204-543-3"
}