Publication detail

Modelling the R-curve behaviour in chevron-notched specimen using weight functions

KOTOUL, M. VYSLOUŽIL, T. DLOUHÝ, I.

Czech title

Modelování R-křivek pro stabilní růst trhliny ve vzorku s šípovým vrubem pomocí váhových funkcí.

English title

Modelling the R-curve behaviour in chevron-notched specimen using weight functions

Type

conference paper

Language

en

Original abstract

The contribution deals with modeling of bridged crack in the chevron-notched three point bending specimen made of the glass matrix composite reinforced by long SiC fibres. Weight functions for orthotropic material are obtained numerically by means of detailed FEM analysis in the system ANSYS and they are further used together with a bridging model available in literature to theoretical prediction of R-curve. Material orthotropy is captured using Barnett-Lothe's tensors calculated directly from the elastic moduli of composite. Recurrent calculations for the crack opening displacement resulting from applied loading and bridging stresses were performed within the system MAPLE. Theoretical results are then compared with experimental data.

Czech abstract

Příspěvek se zabývá modelováním stabilního růstu přemostěné trhliny ve vzorku na tříbodový ohyb s šípovým vrubem. Vzorek je zhotoven z vláknového kompozitu se skelnou matricí. Váhové funkce pro ortotropní materiál jsou získány numericky pomocí MKP. Teoretická predikce R-křivky je založena na existujícím modelu přemostění trhliny převzatém z literatury. Teoretické výsledky jsou srovnány s experimentálními daty.

English abstract

The contribution deals with modeling of bridged crack in the chevron-notched three point bending specimen made of the glass matrix composite reinforced by long SiC fibres. Weight functions for orthotropic material are obtained numerically by means of detailed FEM analysis in the system ANSYS and they are further used together with a bridging model available in literature to theoretical prediction of R-curve. Material orthotropy is captured using Barnett-Lothe's tensors calculated directly from the elastic moduli of composite. Recurrent calculations for the crack opening displacement resulting from applied loading and bridging stresses were performed within the system MAPLE. Theoretical results are then compared with experimental data.

Keywords in Czech

modelovaní R-křivky, váhové funkce, kompozity s křehkou matricí

Keywords in English

R-curve modelling, weight functions, brittle matrix composites

RIV year

2005

Released

01.01.2005

Publisher

EC, Ltd., UK

Location

Eastleigh, England

ISBN

0-9547783-1-6

Book

Advances in Fracture and Damage Mechanics IV

Pages count

9

BIBTEX


@inproceedings{BUT14893,
  author="Michal {Kotoul} and Tomáš {Vysloužil} and Ivo {Dlouhý},
  title="Modelling the R-curve behaviour in chevron-notched specimen using weight functions",
  booktitle="Advances in Fracture and Damage Mechanics IV",
  year="2005",
  month="January",
  publisher="EC, Ltd., UK",
  address="Eastleigh, England",
  isbn="0-9547783-1-6"
}