Publication result detail

Modelling of cracking of the ceramic foam specimen with a central notch under the tensile load

ŠEVEČEK, O.; BERTOLLA, L.; CHLUP, Z.; ŘEHOŘEK, L.; MAJER, Z.; MARCIÁN, P.; KOTOUL, M.

Original Title

Modelling of cracking of the ceramic foam specimen with a central notch under the tensile load

English Title

Modelling of cracking of the ceramic foam specimen with a central notch under the tensile load

Type

WoS Article

Original Abstract

In this contribution, open cell ceramic foam structures composed of regular/irregular shape cells and containing macroscopic central notch/crack are investigated in terms of their cracking upon the tensile loading and their strength is predicted using the FE simulations. The developed model of the real ceramic foam specimen contains a central notch/crack and is subjected to a tension, resulting in a failure beginning at the tip of the notch. The work discusses an approach how to predict the critical failure load and also the crack path in the foam structure. Various cell irregularity and size of the macroscopic notch is considered in the investigations. Predictions of the foam structure cracking are performed using the beam element based FE model having characteristics of the real foam structure and by utilization of the stress criterion which considers failure of particular struts, when the maximal stress on them reaches the tensile strength of the ceramic material. Outputs from simulations are compared with available experimental observations and with an estimation of the critical failure load calculated using the developed analytical model.

English abstract

In this contribution, open cell ceramic foam structures composed of regular/irregular shape cells and containing macroscopic central notch/crack are investigated in terms of their cracking upon the tensile loading and their strength is predicted using the FE simulations. The developed model of the real ceramic foam specimen contains a central notch/crack and is subjected to a tension, resulting in a failure beginning at the tip of the notch. The work discusses an approach how to predict the critical failure load and also the crack path in the foam structure. Various cell irregularity and size of the macroscopic notch is considered in the investigations. Predictions of the foam structure cracking are performed using the beam element based FE model having characteristics of the real foam structure and by utilization of the stress criterion which considers failure of particular struts, when the maximal stress on them reaches the tensile strength of the ceramic material. Outputs from simulations are compared with available experimental observations and with an estimation of the critical failure load calculated using the developed analytical model.

Keywords

Ceramic foam; notch; fracture; FE model; Kelvin cell; tensile test.

Key words in English

Ceramic foam; notch; fracture; FE model; Kelvin cell; tensile test.

Authors

ŠEVEČEK, O.; BERTOLLA, L.; CHLUP, Z.; ŘEHOŘEK, L.; MAJER, Z.; MARCIÁN, P.; KOTOUL, M.

RIV year

2019

Released

25.01.2019

Publisher

Elsevier

Location

Netherlands

ISBN

0167-8442

Periodical

THEORETICAL AND APPLIED FRACTURE MECHANICS

Volume

100

Number

1

State

Kingdom of the Netherlands

Pages from

242

Pages to

250

Pages count

9

URL

https://www.sciencedirect.com/science/article/pii/S0167844218306232?via%3Dihub

BibTex

@article{BUT155948,
  author="Oldřich {Ševeček} and Luca {Bertolla} and Zdeněk {Chlup} and Lukáš {Řehořek} and Zdeněk {Majer} and Petr {Marcián} and Michal {Kotoul}",
  title="Modelling of cracking of the ceramic foam specimen with a central notch under the tensile load",
  journal="THEORETICAL AND APPLIED FRACTURE MECHANICS",
  year="2019",
  volume="100",
  number="1",
  pages="242--250",
  doi="10.1016/j.tafmec.2019.01.024",
  issn="0167-8442",
  url="https://www.sciencedirect.com/science/article/pii/S0167844218306232?via%3Dihub"
}