Publication detail

Toughness of brittle–matrix composites with heterogeneous reinforcement

RYPL, R. VOŘECHOVSKÝ, M. CHUDOBA, R.

Original Title

Toughness of brittle–matrix composites with heterogeneous reinforcement

English Title

Toughness of brittle–matrix composites with heterogeneous reinforcement

Type

conference paper

Language

Czech

Original Abstract

Elastic properties of fibrous composites are conveniently modeled by rules of mixtures which appropriately combine the elastic properties of individual constituents and allow for a homogenized representation of the composite behavior. However, elasticity may be lost at load levels far below the ultimate performance of the composite due to matrix and/or fiber damage and fiber debonding. It has been proved that statistical-mechanical models perform well for the inelastic range of composites mechanics. This article describes a statistical-mechanical model which introduces the possibility to simulate heterogeneity in bond properties. The model is appropriate e.g. for the newly developed composite material textile reinforced concrete (TRC), where the bond heterogeneity is caused by irregular penetration of the cementitious matrix into the structure of reinforcing multifilament yarns. It is shown that the heterogeneous bond significantly reduces the composite strength.

English abstract

Elastic properties of fibrous composites are conveniently modeled by rules of mixtures which appropriately combine the elastic properties of individual constituents and allow for a homogenized representation of the composite behavior. However, elasticity may be lost at load levels far below the ultimate performance of the composite due to matrix and/or fiber damage and fiber debonding. It has been proved that statistical-mechanical models perform well for the inelastic range of composites mechanics. This article describes a statistical-mechanical model which introduces the possibility to simulate heterogeneity in bond properties. The model is appropriate e.g. for the newly developed composite material textile reinforced concrete (TRC), where the bond heterogeneity is caused by irregular penetration of the cementitious matrix into the structure of reinforcing multifilament yarns. It is shown that the heterogeneous bond significantly reduces the composite strength.

Keywords

composite strength; composite toughness; heterogeneous reinforcement; Weibull statistics; fiber damage; probabilistic analysis

Key words in English

composite strength; composite toughness; heterogeneous reinforcement; Weibull statistics; fiber damage; probabilistic analysis

Authors

RYPL, R.; VOŘECHOVSKÝ, M.; CHUDOBA, R.

RIV year

2014

Released

1. 6. 2014

Publisher

ELSEVIER

Location

USA

ISBN

9781632669094

Book

Procedia Materials Science

ISBN

2211-8128

Periodical

Procedia Materials Science

Year of study

2014

Number

3

State

Kingdom of the Netherlands

Pages from

2168

Pages to

2173

Pages count

6

BibTex

@inproceedings{BUT112450,
  author="Rostislav {Rypl} and Miroslav {Vořechovský} and Rostislav {Chudoba}",
  title="Toughness of brittle–matrix composites with heterogeneous reinforcement",
  booktitle="Procedia Materials Science",
  year="2014",
  journal="Procedia Materials Science",
  volume="2014",
  number="3",
  pages="2168--2173",
  publisher="ELSEVIER",
  address="USA",
  doi="10.1016/j.mspro.2014.06.351",
  isbn="9781632669094",
  issn="2211-8128"
}