Publication detail

Prediction of the ceramic foam structure failure using a detailed finite element model

ŠEVEČEK, O. HANÁK, J. MAJER, Z. DRDLÍK, D. CHLUP, Z. KOTOUL, M.

Original Title

Prediction of the ceramic foam structure failure using a detailed finite element model

Type

conference paper

Language

English

Original Abstract

The contribution deals with modelling and prediction of failure of mechanically loaded open cell ceramic foam structures by using 3D volume FE models constructed from CT scans of real foam specimens. The condition for crack initiation in particular struts comes from the coupled stress-energy criterion which combines two fracture-mechanics parameters of the investigated material – tensile strength and its fracture toughness. By combining of both stress and energy condition one obtains information about the crack initiation length which is later used (together with the tensile strength) for determination of the strut failure in the complex 3D FE model of the ceramic foam structure. The crack onset is considered in the critical location at the moment when the (tensile) principal stress under the strut surface (in a depth corresponding to the crack initiation length) exceeded the tensile strength of the strut. Such approach enables us to define failure also on relatively coarse meshes of the FE models where potential stress concentrations are not described precisely and therefore it is not possible to decide about the failure just based upon the value of tensile stress on the strut surface.

Keywords

Ceramic foam;Coupled criterion;Crack;FE model;FEM;Finite Fracture Mechanics

Authors

ŠEVEČEK, O.; HANÁK, J.; MAJER, Z.; DRDLÍK, D.; CHLUP, Z.; KOTOUL, M.

Released

1. 2. 2020

Publisher

Trans Tech Publications Ltd

Location

Švýcarsko

ISBN

9783035715866

Book

Advances in Fracture and Damage Mechanics XVIII

Edition

1

Edition number

1

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Year of study

1

Number

827

State

Swiss Confederation

Pages from

222

Pages to

227

Pages count

6

URL

https://www.scientific.net/KEM.827.222

BibTex

@inproceedings{BUT163776,
  author="Oldřich {Ševeček} and Jiří {Hanák} and Zdeněk {Majer} and Daniel {Drdlík} and Zdeněk {Chlup} and Michal {Kotoul}",
  title="Prediction of the ceramic foam structure failure using a detailed finite element model",
  booktitle="Advances in Fracture and Damage Mechanics XVIII",
  year="2020",
  series="1",
  journal="Key Engineering Materials (print)",
  volume="1",
  number="827",
  pages="222--227",
  publisher="Trans Tech Publications Ltd",
  address="Švýcarsko",
  doi="10.4028/www.scientific.net/KEM.827.222",
  isbn="9783035715866",
  issn="1013-9826",
  url="https://www.scientific.net/KEM.827.222"
}