Publication detail

Behaviour of a crack in a corner or at a tip of a polygon-like particle

KLUSÁK, J. KREPL, O. PROFANT, T.

Original Title

Behaviour of a crack in a corner or at a tip of a polygon-like particle

Type

conference paper

Language

English

Original Abstract

Crack propagation in particle composite materials depends on the properties of a matrix and a particle. A changing combination of the materials of a matrix and a particle together with various shape of the particle can result either in an increase or decrease of global fracture properties of the composite. A crack propagating through a particle composite can be found in the following positions: (i) a crack with its tip in the matrix and approaching the particle, (ii) a crack with its tip at the matrix/particle interface, (iii) a crack passing through the particle (iv) a crack lying in the matrix/particle interface, (v) a crack with its tip in a corner or at a tip of a polygon-like particle. The stress state in the second and the last cases differs from the stress field of a crack in a homogeneous material. The last case can be simulated by means of a bi-material notch model. The model can be used for evaluation of toughening mechanisms of silicate based composites with various shapes of aggregates. The stress singularity exponents of the bi-material models are determined and analyzed for typical materials combinations and typical shapes of aggregates. As silicate based composites exhibit quasi-brittle behaviour, the stress field should be described in a larger area ahead of a crack tip. For this reason, the exponents of non-singular stress terms are analysed as well. Stress distribution in the vicinity of a crack tip is analysed and conditions for further crack propagation are estimated.

Keywords

Composite materials; Silicate based composites; General singular stress concentrators; Generalized linear elastic fracture mechanics

Authors

KLUSÁK, J.; KREPL, O.; PROFANT, T.

Released

21. 7. 2016

Publisher

Elsevier

ISBN

2452-3216

Periodical

Procedia Structural Integrity

Year of study

2

Number

1

State

Republic of Italy

Pages from

1912

Pages to

1919

Pages count

8

URL

https://www.sciencedirect.com/science/article/pii/S2452321616302517

Full text in the Digital Library

http://hdl.handle.net/11012/204234

BibTex

@inproceedings{BUT129339,
  author="Jan {Klusák} and Ondřej {Krepl} and Tomáš {Profant}",
  title="Behaviour of a crack in a corner or at a tip of a polygon-like particle",
  booktitle="Procedia Structural Integrity",
  year="2016",
  journal="Procedia Structural Integrity",
  volume="2",
  number="1",
  pages="1912--1919",
  publisher="Elsevier",
  doi="10.1016/j.prostr.2016.06.240",
  issn="2452-3216",
  url="https://www.sciencedirect.com/science/article/pii/S2452321616302517"
}