Publication detail

Understanding the tensile strength of ceramics in the presence of small critical flaws

MARTIN, É. LEGUILLON, D. ŠEVEČEK, O. BERMEJO, R.

English title

Understanding the tensile strength of ceramics in the presence of small critical flaws

Type

journal article in Web of Science

Language

en

Original abstract

The effect of small critical flaws on the strength of polycrystalline ceramic materials is analyzed with the help of an initiation criterion combining both a stress and an energy conditions. If the size of the defect is smaller than the characteristic material length, numerical predictions reveal that the defect (either sharp or blunt) has no effect on the strength. This result is in a good agreement with experimental results obtained from the strength measurements of ceramic materials with controlled flaws. Combining two fracture tests after introducing flaws with controlled sizes enables to identify the fracture parameters of the ceramic material.

English abstract

The effect of small critical flaws on the strength of polycrystalline ceramic materials is analyzed with the help of an initiation criterion combining both a stress and an energy conditions. If the size of the defect is smaller than the characteristic material length, numerical predictions reveal that the defect (either sharp or blunt) has no effect on the strength. This result is in a good agreement with experimental results obtained from the strength measurements of ceramic materials with controlled flaws. Combining two fracture tests after introducing flaws with controlled sizes enables to identify the fracture parameters of the ceramic material.

Keywords in English

Crack nucleation; Coupled criterion; Finite fracture mechanics; Tensile strength; Ceramics

Released

19.09.2018

Publisher

Elsevier

Location

Netherlands

ISSN

0013-7944

Volume

201

Number

1

Pages from–to

167–175

Pages count

9

BIBTEX


@article{BUT149056,
  author="Éric {Martin} and Dominique {Leguillon} and Oldřich {Ševeček} and Raul {Bermejo},
  title="Understanding the tensile strength of ceramics in the presence of small critical flaws",
  year="2018",
  volume="201",
  number="1",
  month="September",
  pages="167--175",
  publisher="Elsevier",
  address="Netherlands",
  issn="0013-7944"
}