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"
}