Publication detail

Estimation of apparent fracture toughness of ceramic laminates based on generalized strain energy density factor

NÁHLÍK, L. ŠESTÁKOVÁ, L. HUTAŘ, P.

Original Title

Estimation of apparent fracture toughness of ceramic laminates based on generalized strain energy density factor

Type

conference paper

Language

English

Original Abstract

The paper presented deals with fracture behavior of ceramic laminates. Assumptions of the linear elastic fracture mechanics and small scale yielding are considered. In this frame the residual stresses in individual layers of Al2O3/5vol.%t-ZrO2 (ATZ) and Al2O3/30vol.%m-ZrO2 (AMZ) are determined. The procedure based on generalization of Sih's strain energy density factor to the case of a crack touching the interfaces between two dissimilar materials is used for determination of effective values of stress intensity factor at material interfaces. Important increase of the fracture toughness at AMZ/ATZ interface was predicted in comparison to the fracture toughness of individual material components. Predicted values were compared with data available in literature and mutual good agreement was found. Procedure suggested can be used for estimation of resistance to crack propagation of multilayered structures and its design. The procedure can contribute to enhancing of reliability and safety of the structural ceramic or generally of layered composites with strong interfaces.

Keywords

layered structures, residual stress, flaw tolerance, bimaterial interface, strain energy density, fracture toughness, ceramic composite.

Authors

NÁHLÍK, L.; ŠESTÁKOVÁ, L.; HUTAŘ, P.

RIV year

2008

Released

2. 9. 2008

Publisher

VUTIUM Brno

Location

Brno

ISBN

9781617823190

Book

17th European Conference on Fracture

Pages from

1522

Pages to

1529

Pages count

8

BibTex

@inproceedings{BUT31228,
  author="Luboš {Náhlík} and Lucie {Malíková} and Pavel {Hutař}",
  title="Estimation of apparent fracture toughness of ceramic laminates based on generalized strain energy density factor",
  booktitle="17th European Conference on Fracture",
  year="2008",
  pages="1522--1529",
  publisher="VUTIUM Brno",
  address="Brno",
  isbn="9781617823190"
}