Publication detail

Study of crack behaviour during mechanical stressing of composite materials

KOKTAVÝ, B. KOKTAVÝ, P. GRMELA, L.

Original Title

Study of crack behaviour during mechanical stressing of composite materials

Czech Title

Studium chování trhlin v průběhu mechanického zatěžování kompozitních materiálů

English Title

Study of crack behaviour during mechanical stressing of composite materials

Type

conference paper

Language

en

Original Abstract

The phenomenon of stochastic electromagnetic emission (EME) from solids is based on the generation of an electromagnetic field accompanying the mechanical excitation of the solids in question. Our experiments were carried out on a composite dielectric material, consisting of fibrous glass reinforcement which was bound with resin-based binding agents. The time development of a voltage u(t) across a load resistor being connected in series with a sensing capacitor was measured. The time behaviour of the product of the electric charge and its velocity q(t)v(t) can be determined from the voltages u(t). The crack generation process may be split into two phases. The first phase includes the crack generation. In this phase, both this quantities are varying. During the second phase, the crack walls are moving while the charge they are carrying is virtually stabilized. This method is a convenient tool for study of microcracks arising in stressed solid dielectric materials.

Czech abstract

Jev elektromagnetické emise je založen na generaci elektromagnetického pole v důsledku mechanického zatěžování pevných látek. V této práci jsme se zabývali vznikem elektromagnetické emise v kompozitním materiálu extren.

English abstract

The phenomenon of stochastic electromagnetic emission (EME) from solids is based on the generation of an electromagnetic field accompanying the mechanical excitation of the solids in question. Our experiments were carried out on a composite dielectric material, consisting of fibrous glass reinforcement which was bound with resin-based binding agents. The time development of a voltage u(t) across a load resistor being connected in series with a sensing capacitor was measured. The time behaviour of the product of the electric charge and its velocity q(t)v(t) can be determined from the voltages u(t). The crack generation process may be split into two phases. The first phase includes the crack generation. In this phase, both this quantities are varying. During the second phase, the crack walls are moving while the charge they are carrying is virtually stabilized. This method is a convenient tool for study of microcracks arising in stressed solid dielectric materials.

Keywords

Crack, electric charge, electromagnetic emission, acoustic emission

RIV year

2007

Released

15.11.2007

Publisher

Z. Novotný, Ing., CSc.

Location

Brno

ISBN

978-80-7355-078-3

Book

New trends in physics

Edition

-

Edition number

první

Pages from

65

Pages to

68

Pages count

4

BibTex


@inproceedings{BUT25502,
  author="Bohumil {Koktavý} and Pavel {Koktavý} and Lubomír {Grmela}",
  title="Study of crack behaviour during mechanical stressing of composite materials",
  annote="The phenomenon of stochastic electromagnetic emission (EME) from solids is based on the generation of an electromagnetic field accompanying the mechanical excitation of the solids in question. Our experiments were carried out on a composite dielectric material, consisting of fibrous glass reinforcement which was bound with resin-based binding agents. The time development of a voltage u(t) across a load resistor being connected in series with a sensing capacitor was measured. The time behaviour of the product of the electric charge and its velocity q(t)v(t) can be determined from the voltages u(t). The crack generation process may be split into two phases. The first phase includes the crack generation. In this phase, both this quantities are varying. During the second phase, the crack walls are moving while the charge they are carrying is virtually stabilized. This method is a convenient tool for study of microcracks arising in stressed solid dielectric materials.",
  address="Z. Novotný, Ing., CSc.",
  booktitle="New trends in physics",
  chapter="25502",
  edition="-",
  institution="Z. Novotný, Ing., CSc.",
  year="2007",
  month="november",
  pages="65--68",
  publisher="Z. Novotný, Ing., CSc.",
  type="conference paper"
}