Publication detail

Fracture Mechanics Description of Crack Propagation in Ceramic Laminates

ŠTEGNEROVÁ, K. NÁHLÍK, L. HUTAŘ, P.

Original Title

Fracture Mechanics Description of Crack Propagation in Ceramic Laminates

Type

abstract

Language

English

Original Abstract

The layered ceramic composites are in the interest of the researches, because of their improved fracture toughness, strength and reliability in comparison to monolithic ceramics. Multilayered design combines layers with differentmaterial properties and especially coefficients of thermal expansion. Due to this fact, during the sintering process, the high residual stresses appear in the laminate, which subsequently significantly influence the fracture behavior. The contribution is focused on the alumina-zirconia layered system with strong compressive residual stresses serving as a barrier for the crack propagation through the laminate body. Propagating crack can stay arrested in the compressive layer or is strongly deflected from the original direction of crack propagation. It leads to the higher value of so-called apparent fracture toughness of the ceramic laminate. The assumptions of the linear elastic fracture mechanics and small scale yielding condition are considered in the contribution for the description of the crack propagation. The stress field is obtained numerically by using the finite element method.Thetheory based on strain energy density factor was used for determination of the crack behavior. The work contributes to the better understanding of failure process of ceramic laminates.

Keywords

Ceramic laminate, residual stresses, crack propagation direction, strain energy density factor.

Authors

ŠTEGNEROVÁ, K.; NÁHLÍK, L.; HUTAŘ, P.

Released

13. 4. 2015

Publisher

Česká technika – Nakladatelství ČVUT

Location

Thákurova 1, Praha 6

ISBN

978-80-01-05708-7

Book

APPLIED MECHANICS 2015 – Book of Abstracts

Edition number

1

Pages from

69

Pages to

70

Pages count

2

BibTex

@misc{BUT114426,
  author="Kateřina {Štegnerová} and Luboš {Náhlík} and Pavel {Hutař}",
  title="Fracture Mechanics Description of Crack Propagation in Ceramic Laminates
",
  booktitle="APPLIED MECHANICS 2015 – Book of Abstracts",
  year="2015",
  edition="1",
  pages="69--70",
  publisher="Česká technika – Nakladatelství ČVUT",
  address="Thákurova 1, Praha 6",
  isbn="978-80-01-05708-7",
  note="abstract"
}