Publication detail

Accuracy of approximation of stress field in cracked bodies for failure zone extent estimation

MALÍKOVÁ, L. VESELÝ, V. SOBEK, J. FRANTÍK, P.

Original Title

Accuracy of approximation of stress field in cracked bodies for failure zone extent estimation

Type

conference paper

Language

English

Original Abstract

Accurate knowledge of stress/displacement field in a cracked specimen is very important for fracture analysis and for instance in the case of quasi-brittle materials, where the zone of non-linear behavior affecting the overall fracture process is larger than in other (brittle) materials, it can play a key role. In this paper, it is shown that Williams expansion can describe the crack-tip fields reliably, provided that considerably more than one or two terms of the power series are taking into account. Such an approach, referred to as multi-parameter fracture mechanics, is usually not used for a common assessment of crack behavior. The study presented shows that especially in larger distances from the crack tip the higher-order terms are crucial in order to minimize the error corre¬sponding with use of only one or two fracture parameters (the first and second terms of Williams expansion). In other words, considering of the higher-order terms of the Williams expansion is essential if knowledge of accurate stress/displacement fields around the crack tip in the analysed specimen/structure is required.

Keywords

Near-crack-tip fields, Williams power expansion, over-deterministic method, finite elements, failure zone extent

Authors

MALÍKOVÁ, L.; VESELÝ, V.; SOBEK, J.; FRANTÍK, P.

RIV year

2013

Released

11. 3. 2013

Location

Toledo, Španělsko

ISBN

978-84-941004-0-6

Book

Fracture Mechanics of Concrete and Concrete Structures

Pages from

1

Pages to

10

Pages count

10

BibTex

@inproceedings{BUT102198,
  author="Lucie {Malíková} and Václav {Veselý} and Jakub {Sobek} and Petr {Frantík}",
  title="Accuracy of approximation of stress field in cracked bodies for failure zone extent estimation",
  booktitle="Fracture Mechanics of Concrete and Concrete Structures",
  year="2013",
  pages="1--10",
  address="Toledo, Španělsko",
  isbn="978-84-941004-0-6"
}