Publication detail

Failure behavior of coated materials

KNÉSL, Z. NÁHLÍK, L. BAREŠ, P.

Original Title

Failure behavior of coated materials

Type

conference paper

Language

English

Original Abstract

Results concerning the influence of a through coating crack on the substrate failure are reported. The problem is studied under the assumptions corresponding to small scale yielding conditions and calculations are performed by the finite element method. An approximate approach based on calculations of crack mouth opening displacement for thin protective layers is suggested. It is concluded that in the case of a stiffer coating on a more compliant substrate, the through coating cracks represent dangerous stress concentrators, and as a consequence of elastic mismatch of both materials, the critical applied stress for substrate failure decreases. Traditional approaches may have underestimated this effect and estimations of the service life of coated structures neglecting this phenomenon could lead to non-conservative values, with unexpected failures.

Keywords

crack mouth opening displacement, crack propagation, bimaterial interface

Authors

KNÉSL, Z.; NÁHLÍK, L.; BAREŠ, P.

RIV year

2005

Released

23. 8. 2005

Publisher

University of Zilina

Location

Žilina

ISBN

80-969165-4-8

Book

10 th International Conference on Numerical Methods in Continuum Mechanics

Pages from

47

Pages to

48

Pages count

2

BibTex

@inproceedings{BUT21717,
  author="Zdeněk {Knésl} and Luboš {Náhlík} and Pavel {Bareš}",
  title="Failure behavior of coated materials",
  booktitle="10 th International Conference on Numerical Methods in Continuum Mechanics",
  year="2005",
  pages="47--48",
  publisher="University of Zilina",
  address="Žilina",
  isbn="80-969165-4-8"
}